diff --git a/.devcontainer/portability-ubuntu-trusty-toolchain-gcc_9-minimal/devcontainer.json b/.devcontainer/portability-fedora-40-minimal/devcontainer.json
similarity index 84%
rename from .devcontainer/portability-ubuntu-trusty-toolchain-gcc_9-minimal/devcontainer.json
rename to .devcontainer/portability-fedora-40-minimal/devcontainer.json
index 7a250c6ba02..dd037154fe3 100644
--- a/.devcontainer/portability-ubuntu-trusty-toolchain-gcc_9-minimal/devcontainer.json
+++ b/.devcontainer/portability-fedora-40-minimal/devcontainer.json
@@ -3,12 +3,12 @@
 //      from .devcontainer/portability-devcontainer.json.in
 // See https://aka.ms/devcontainer.json for format details.
 {
-    "name": "ubuntu-trusty-toolchain-gcc_9-minimal (≥ 8-core)",
+    "name": "fedora-40-minimal (≥ 8-core)",
     "build": {
         "dockerfile": "portability-Dockerfile",
         // See tox.ini for definitions
         "args": {
-            "SYSTEM_FACTOR": "ubuntu-trusty-toolchain-gcc_9",
+            "SYSTEM_FACTOR": "fedora-40",
             "PACKAGE_FACTOR": "minimal",
             "DOCKER_TARGET": "with-targets",
             "DOCKER_TAG": "dev"
diff --git a/.devcontainer/portability-opensuse-15.3-gcc_11-python3.9-minimal/portability-Dockerfile b/.devcontainer/portability-fedora-40-minimal/portability-Dockerfile
similarity index 100%
rename from .devcontainer/portability-opensuse-15.3-gcc_11-python3.9-minimal/portability-Dockerfile
rename to .devcontainer/portability-fedora-40-minimal/portability-Dockerfile
diff --git a/.devcontainer/portability-ubuntu-trusty-toolchain-gcc_9-standard/devcontainer.json b/.devcontainer/portability-fedora-40-standard/devcontainer.json
similarity index 84%
rename from .devcontainer/portability-ubuntu-trusty-toolchain-gcc_9-standard/devcontainer.json
rename to .devcontainer/portability-fedora-40-standard/devcontainer.json
index 41d1582c950..1f9d4a5e378 100644
--- a/.devcontainer/portability-ubuntu-trusty-toolchain-gcc_9-standard/devcontainer.json
+++ b/.devcontainer/portability-fedora-40-standard/devcontainer.json
@@ -3,12 +3,12 @@
 //      from .devcontainer/portability-devcontainer.json.in
 // See https://aka.ms/devcontainer.json for format details.
 {
-    "name": "ubuntu-trusty-toolchain-gcc_9-standard (≥ 8-core)",
+    "name": "fedora-40-standard (≥ 8-core)",
     "build": {
         "dockerfile": "portability-Dockerfile",
         // See tox.ini for definitions
         "args": {
-            "SYSTEM_FACTOR": "ubuntu-trusty-toolchain-gcc_9",
+            "SYSTEM_FACTOR": "fedora-40",
             "PACKAGE_FACTOR": "standard",
             "DOCKER_TARGET": "with-targets",
             "DOCKER_TAG": "dev"
diff --git a/.devcontainer/portability-opensuse-15.3-gcc_11-python3.9-standard/portability-Dockerfile b/.devcontainer/portability-fedora-40-standard/portability-Dockerfile
similarity index 100%
rename from .devcontainer/portability-opensuse-15.3-gcc_11-python3.9-standard/portability-Dockerfile
rename to .devcontainer/portability-fedora-40-standard/portability-Dockerfile
diff --git a/.devcontainer/portability-opensuse-15.3-gcc_11-python3.9-minimal/devcontainer.json b/.devcontainer/portability-gentoo-python3.12-minimal/devcontainer.json
similarity index 84%
rename from .devcontainer/portability-opensuse-15.3-gcc_11-python3.9-minimal/devcontainer.json
rename to .devcontainer/portability-gentoo-python3.12-minimal/devcontainer.json
index f00b6b66a91..41250ac5e74 100644
--- a/.devcontainer/portability-opensuse-15.3-gcc_11-python3.9-minimal/devcontainer.json
+++ b/.devcontainer/portability-gentoo-python3.12-minimal/devcontainer.json
@@ -3,12 +3,12 @@
 //      from .devcontainer/portability-devcontainer.json.in
 // See https://aka.ms/devcontainer.json for format details.
 {
-    "name": "opensuse-15.3-gcc_11-python3.9-minimal (≥ 8-core)",
+    "name": "gentoo-python3.12-minimal (≥ 8-core)",
     "build": {
         "dockerfile": "portability-Dockerfile",
         // See tox.ini for definitions
         "args": {
-            "SYSTEM_FACTOR": "opensuse-15.3-gcc_11-python3.9",
+            "SYSTEM_FACTOR": "gentoo-python3.12",
             "PACKAGE_FACTOR": "minimal",
             "DOCKER_TARGET": "with-targets",
             "DOCKER_TAG": "dev"
diff --git a/.devcontainer/portability-opensuse-15.4-gcc_11-python3.10-minimal/portability-Dockerfile b/.devcontainer/portability-gentoo-python3.12-minimal/portability-Dockerfile
similarity index 100%
rename from .devcontainer/portability-opensuse-15.4-gcc_11-python3.10-minimal/portability-Dockerfile
rename to .devcontainer/portability-gentoo-python3.12-minimal/portability-Dockerfile
diff --git a/.devcontainer/portability-opensuse-15.3-gcc_11-python3.9-standard/devcontainer.json b/.devcontainer/portability-gentoo-python3.12-standard/devcontainer.json
similarity index 84%
rename from .devcontainer/portability-opensuse-15.3-gcc_11-python3.9-standard/devcontainer.json
rename to .devcontainer/portability-gentoo-python3.12-standard/devcontainer.json
index 2444967bdad..3193910dd6a 100644
--- a/.devcontainer/portability-opensuse-15.3-gcc_11-python3.9-standard/devcontainer.json
+++ b/.devcontainer/portability-gentoo-python3.12-standard/devcontainer.json
@@ -3,12 +3,12 @@
 //      from .devcontainer/portability-devcontainer.json.in
 // See https://aka.ms/devcontainer.json for format details.
 {
-    "name": "opensuse-15.3-gcc_11-python3.9-standard (≥ 8-core)",
+    "name": "gentoo-python3.12-standard (≥ 8-core)",
     "build": {
         "dockerfile": "portability-Dockerfile",
         // See tox.ini for definitions
         "args": {
-            "SYSTEM_FACTOR": "opensuse-15.3-gcc_11-python3.9",
+            "SYSTEM_FACTOR": "gentoo-python3.12",
             "PACKAGE_FACTOR": "standard",
             "DOCKER_TARGET": "with-targets",
             "DOCKER_TAG": "dev"
diff --git a/.devcontainer/portability-opensuse-15.4-gcc_11-python3.10-standard/portability-Dockerfile b/.devcontainer/portability-gentoo-python3.12-standard/portability-Dockerfile
similarity index 100%
rename from .devcontainer/portability-opensuse-15.4-gcc_11-python3.10-standard/portability-Dockerfile
rename to .devcontainer/portability-gentoo-python3.12-standard/portability-Dockerfile
diff --git a/.devcontainer/portability-opensuse-15.4-gcc_11-python3.10-minimal/devcontainer.json b/.devcontainer/portability-linuxmint-21.3-minimal/devcontainer.json
similarity index 84%
rename from .devcontainer/portability-opensuse-15.4-gcc_11-python3.10-minimal/devcontainer.json
rename to .devcontainer/portability-linuxmint-21.3-minimal/devcontainer.json
index aa8549b345d..6350569173d 100644
--- a/.devcontainer/portability-opensuse-15.4-gcc_11-python3.10-minimal/devcontainer.json
+++ b/.devcontainer/portability-linuxmint-21.3-minimal/devcontainer.json
@@ -3,12 +3,12 @@
 //      from .devcontainer/portability-devcontainer.json.in
 // See https://aka.ms/devcontainer.json for format details.
 {
-    "name": "opensuse-15.4-gcc_11-python3.10-minimal (≥ 8-core)",
+    "name": "linuxmint-21.3-minimal (≥ 8-core)",
     "build": {
         "dockerfile": "portability-Dockerfile",
         // See tox.ini for definitions
         "args": {
-            "SYSTEM_FACTOR": "opensuse-15.4-gcc_11-python3.10",
+            "SYSTEM_FACTOR": "linuxmint-21.3",
             "PACKAGE_FACTOR": "minimal",
             "DOCKER_TARGET": "with-targets",
             "DOCKER_TAG": "dev"
diff --git a/.devcontainer/portability-ubuntu-trusty-toolchain-gcc_9-minimal/portability-Dockerfile b/.devcontainer/portability-linuxmint-21.3-minimal/portability-Dockerfile
similarity index 100%
rename from .devcontainer/portability-ubuntu-trusty-toolchain-gcc_9-minimal/portability-Dockerfile
rename to .devcontainer/portability-linuxmint-21.3-minimal/portability-Dockerfile
diff --git a/.devcontainer/portability-opensuse-15.4-gcc_11-python3.10-standard/devcontainer.json b/.devcontainer/portability-linuxmint-21.3-standard/devcontainer.json
similarity index 84%
rename from .devcontainer/portability-opensuse-15.4-gcc_11-python3.10-standard/devcontainer.json
rename to .devcontainer/portability-linuxmint-21.3-standard/devcontainer.json
index 5278ae20eac..245fee17201 100644
--- a/.devcontainer/portability-opensuse-15.4-gcc_11-python3.10-standard/devcontainer.json
+++ b/.devcontainer/portability-linuxmint-21.3-standard/devcontainer.json
@@ -3,12 +3,12 @@
 //      from .devcontainer/portability-devcontainer.json.in
 // See https://aka.ms/devcontainer.json for format details.
 {
-    "name": "opensuse-15.4-gcc_11-python3.10-standard (≥ 8-core)",
+    "name": "linuxmint-21.3-standard (≥ 8-core)",
     "build": {
         "dockerfile": "portability-Dockerfile",
         // See tox.ini for definitions
         "args": {
-            "SYSTEM_FACTOR": "opensuse-15.4-gcc_11-python3.10",
+            "SYSTEM_FACTOR": "linuxmint-21.3",
             "PACKAGE_FACTOR": "standard",
             "DOCKER_TARGET": "with-targets",
             "DOCKER_TAG": "dev"
diff --git a/.devcontainer/portability-ubuntu-trusty-toolchain-gcc_9-standard/portability-Dockerfile b/.devcontainer/portability-linuxmint-21.3-standard/portability-Dockerfile
similarity index 100%
rename from .devcontainer/portability-ubuntu-trusty-toolchain-gcc_9-standard/portability-Dockerfile
rename to .devcontainer/portability-linuxmint-21.3-standard/portability-Dockerfile
diff --git a/.devcontainer/portability-ubuntu-noble-minimal/devcontainer.json b/.devcontainer/portability-ubuntu-noble-minimal/devcontainer.json
new file mode 100644
index 00000000000..f22b6775f74
--- /dev/null
+++ b/.devcontainer/portability-ubuntu-noble-minimal/devcontainer.json
@@ -0,0 +1,25 @@
+// The command "tox -e update_docker_platforms"
+//   creates .devcontainer/portability-*-*/devcontainer.json
+//      from .devcontainer/portability-devcontainer.json.in
+// See https://aka.ms/devcontainer.json for format details.
+{
+    "name": "ubuntu-noble-minimal (≥ 8-core)",
+    "build": {
+        "dockerfile": "portability-Dockerfile",
+        // See tox.ini for definitions
+        "args": {
+            "SYSTEM_FACTOR": "ubuntu-noble",
+            "PACKAGE_FACTOR": "minimal",
+            "DOCKER_TARGET": "with-targets",
+            "DOCKER_TAG": "dev"
+        }
+    },
+    "containerEnv": {
+        "MAKE": "make -j4"
+    },
+    "onCreateCommand": ".devcontainer/onCreate.sh",
+    "updateContentCommand": ".devcontainer/portability-updateContent.sh",
+    "extensions": [
+        "ms-python.python"
+    ]
+}
diff --git a/.devcontainer/portability-ubuntu-noble-minimal/portability-Dockerfile b/.devcontainer/portability-ubuntu-noble-minimal/portability-Dockerfile
new file mode 120000
index 00000000000..692e2a79d64
--- /dev/null
+++ b/.devcontainer/portability-ubuntu-noble-minimal/portability-Dockerfile
@@ -0,0 +1 @@
+../portability-Dockerfile
\ No newline at end of file
diff --git a/.devcontainer/portability-ubuntu-noble-standard/devcontainer.json b/.devcontainer/portability-ubuntu-noble-standard/devcontainer.json
new file mode 100644
index 00000000000..7acec1e29ac
--- /dev/null
+++ b/.devcontainer/portability-ubuntu-noble-standard/devcontainer.json
@@ -0,0 +1,25 @@
+// The command "tox -e update_docker_platforms"
+//   creates .devcontainer/portability-*-*/devcontainer.json
+//      from .devcontainer/portability-devcontainer.json.in
+// See https://aka.ms/devcontainer.json for format details.
+{
+    "name": "ubuntu-noble-standard (≥ 8-core)",
+    "build": {
+        "dockerfile": "portability-Dockerfile",
+        // See tox.ini for definitions
+        "args": {
+            "SYSTEM_FACTOR": "ubuntu-noble",
+            "PACKAGE_FACTOR": "standard",
+            "DOCKER_TARGET": "with-targets",
+            "DOCKER_TAG": "dev"
+        }
+    },
+    "containerEnv": {
+        "MAKE": "make -j4"
+    },
+    "onCreateCommand": ".devcontainer/onCreate.sh",
+    "updateContentCommand": ".devcontainer/portability-updateContent.sh",
+    "extensions": [
+        "ms-python.python"
+    ]
+}
diff --git a/.devcontainer/portability-ubuntu-noble-standard/portability-Dockerfile b/.devcontainer/portability-ubuntu-noble-standard/portability-Dockerfile
new file mode 120000
index 00000000000..692e2a79d64
--- /dev/null
+++ b/.devcontainer/portability-ubuntu-noble-standard/portability-Dockerfile
@@ -0,0 +1 @@
+../portability-Dockerfile
\ No newline at end of file
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 5944e32a19d..3eecd1a4666 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -15,7 +15,7 @@ on:
       platform:
         description: 'Platform'
         required: true
-        default: 'ubuntu-focal-standard'
+        default: 'ubuntu-jammy-standard'
       docker_tag:
         description: 'Docker tag'
         required: true
@@ -52,7 +52,7 @@ jobs:
 
   build:
     runs-on: ubuntu-latest
-    container: ghcr.io/sagemath/sage/sage-${{ github.event.inputs.platform || 'ubuntu-focal-standard' }}-with-targets:${{ github.event.inputs.docker_tag || 'dev'}}
+    container: ghcr.io/sagemath/sage/sage-${{ github.event.inputs.platform || 'ubuntu-jammy-standard' }}-with-targets:${{ github.event.inputs.docker_tag || 'dev'}}
     needs: [get_ci_fixes]
     steps:
       - name: Checkout
@@ -93,16 +93,16 @@ jobs:
           ./bootstrap && make build
         working-directory: ./worktree-image
         env:
-          MAKE: make -j2 --output-sync=recurse
-          SAGE_NUM_THREADS: 2
+          MAKE: make -j4 --output-sync=recurse
+          SAGE_NUM_THREADS: 4
 
       - name: Build modularized distributions
         if: (success() || failure()) && steps.worktree.outcome == 'success'
         run: make V=0 tox && make SAGE_CHECK=no pypi-wheels
         working-directory: ./worktree-image
         env:
-          MAKE: make -j2 --output-sync=recurse
-          SAGE_NUM_THREADS: 2
+          MAKE: make -j4 --output-sync=recurse
+          SAGE_NUM_THREADS: 4
 
       - name: Static code check with pyright
         if: (success() || failure()) && steps.worktree.outcome == 'success'
@@ -137,8 +137,8 @@ jobs:
           ./bootstrap && make doc-clean doc-uninstall sagelib-clean && git clean -fx src/sage && ./config.status
         working-directory: ./worktree-image
         env:
-          MAKE: make -j2
-          SAGE_NUM_THREADS: 2
+          MAKE: make -j4
+          SAGE_NUM_THREADS: 4
 
       - name: Build
         # This step is needed because building the modularized distributions installs some optional packages,
@@ -149,8 +149,8 @@ jobs:
           make build
         working-directory: ./worktree-image
         env:
-          MAKE: make -j2 --output-sync=recurse
-          SAGE_NUM_THREADS: 2
+          MAKE: make -j4 --output-sync=recurse
+          SAGE_NUM_THREADS: 4
 
       # Testing
 
@@ -161,16 +161,16 @@ jobs:
           ./sage -t --new -p2
         working-directory: ./worktree-image
         env:
-          MAKE: make -j2 --output-sync=recurse
-          SAGE_NUM_THREADS: 2
+          MAKE: make -j4 --output-sync=recurse
+          SAGE_NUM_THREADS: 4
 
       - name: Test modularized distributions
         if: (success() || failure()) && steps.build.outcome == 'success'
         run: make V=0 tox && make pypi-wheels-check
         working-directory: ./worktree-image
         env:
-          MAKE: make -j2 --output-sync=recurse
-          SAGE_NUM_THREADS: 2
+          MAKE: make -j4 --output-sync=recurse
+          SAGE_NUM_THREADS: 4
 
       - name: Check that all modules can be imported
         run: |
diff --git a/.github/workflows/ci-conda.yml b/.github/workflows/ci-conda.yml
index 1bb08637099..a0f3c021643 100644
--- a/.github/workflows/ci-conda.yml
+++ b/.github/workflows/ci-conda.yml
@@ -35,12 +35,12 @@ jobs:
         # environment: [environment, environment-optional]
         conda-env: [environment]
         # On pull requests, only test two jobs:
-        # Ubuntu with Python 3.9, macOS with Python 3.10.
-        # Build & Test currently uses Python 3.11 (on ubuntu-focal).
+        # Ubuntu with Python 3.9, macOS with Python 3.11.
+        # Build & Test currently uses Python 3.10 (on ubuntu-jammy).
         # Together, they cover the supported minor Python versions.
         include: >-
           ${{ github.event_name == 'pull_request'
-                && fromJson('[{"os": "macos", "python": "3.10", "conda-env": "environment"}]')
+                && fromJson('[{"os": "macos", "python": "3.11", "conda-env": "environment"}]')
                 || fromJson('[]') }}
 
     steps:
diff --git a/.github/workflows/ci-linux.yml b/.github/workflows/ci-linux.yml
index 7e86f010b42..6860bd6e460 100644
--- a/.github/workflows/ci-linux.yml
+++ b/.github/workflows/ci-linux.yml
@@ -46,7 +46,7 @@ jobs:
       targets: build doc-html
       targets_optional: ptest
       tox_system_factors: >-
-        ["ubuntu-focal"]
+        ["ubuntu-jammy"]
       tox_packages_factors: >-
         ["standard"]
       docker_push_repository: ghcr.io/${{ github.repository }}/
@@ -111,18 +111,11 @@ jobs:
         ["ubuntu-jammy",
          "ubuntu-lunar",
          "ubuntu-mantic",
-         "debian-bullseye",
          "debian-bookworm",
          "debian-trixie",
          "debian-sid",
-         "linuxmint-21",
          "linuxmint-21.1",
          "linuxmint-21.2",
-         "fedora-33",
-         "fedora-34",
-         "fedora-35",
-         "fedora-36",
-         "fedora-37",
          "fedora-38",
          "fedora-39",
          "centos-stream-8-python3.9",
@@ -131,11 +124,9 @@ jobs:
          "gentoo-python3.10",
          "gentoo-python3.11",
          "archlinux-latest",
-         "opensuse-15.4-gcc_11-python3.10",
          "opensuse-15.5-gcc_11-python3.11",
          "opensuse-tumbleweed-python3.10",
-         "opensuse-tumbleweed",
-         "debian-bullseye-i386"]
+         "opensuse-tumbleweed"]
       docker_push_repository: ghcr.io/${{ github.repository }}/
       max_parallel: 8
 
diff --git a/.github/workflows/doc-build-pdf.yml b/.github/workflows/doc-build-pdf.yml
index 6e6e8776062..ee90f3a42fc 100644
--- a/.github/workflows/doc-build-pdf.yml
+++ b/.github/workflows/doc-build-pdf.yml
@@ -9,7 +9,7 @@ on:
       platform:
         description: 'Platform'
         required: true
-        default: 'ubuntu-focal-standard'
+        default: 'ubuntu-jammy-standard'
       docker_tag:
         description: 'Docker tag'
         required: true
@@ -46,7 +46,7 @@ jobs:
 
   build-docs-pdf:
     runs-on: ubuntu-latest
-    container: ghcr.io/sagemath/sage/sage-${{ github.event.inputs.platform || 'ubuntu-focal-standard' }}-with-targets:${{ github.event.inputs.docker_tag || 'dev'}}
+    container: ghcr.io/sagemath/sage/sage-${{ github.event.inputs.platform || 'ubuntu-jammy-standard' }}-with-targets:${{ github.event.inputs.docker_tag || 'dev'}}
     needs: [get_ci_fixes]
     steps:
       - name: Checkout
@@ -87,8 +87,8 @@ jobs:
           ./bootstrap && make build
         working-directory: ./worktree-image
         env:
-          MAKE: make -j2 --output-sync=recurse
-          SAGE_NUM_THREADS: 2
+          MAKE: make -j4 --output-sync=recurse
+          SAGE_NUM_THREADS: 4
 
       - name: Build (fallback to non-incremental)
         id: build
@@ -98,8 +98,8 @@ jobs:
           make sagelib-clean && git clean -fx src/sage && ./config.status && make build
         working-directory: ./worktree-image
         env:
-          MAKE: make -j2 --output-sync=recurse
-          SAGE_NUM_THREADS: 2
+          MAKE: make -j4 --output-sync=recurse
+          SAGE_NUM_THREADS: 4
 
       - name: Build docs (PDF)
         id: docbuild
@@ -108,8 +108,8 @@ jobs:
           make doc-clean doc-uninstall; make sagemath_doc_html-build-deps sagemath_doc_pdf-no-deps
         working-directory: ./worktree-image
         env:
-          MAKE: make -j2 --output-sync=recurse
-          SAGE_NUM_THREADS: 2
+          MAKE: make -j4 --output-sync=recurse
+          SAGE_NUM_THREADS: 4
 
       - name: Copy docs
         id: copy
diff --git a/.github/workflows/doc-build.yml b/.github/workflows/doc-build.yml
index 21e19e3859a..b3c275d8e0a 100644
--- a/.github/workflows/doc-build.yml
+++ b/.github/workflows/doc-build.yml
@@ -41,7 +41,7 @@ jobs:
 
   build-docs:
     runs-on: ubuntu-latest
-    container: ghcr.io/sagemath/sage/sage-ubuntu-focal-standard-with-targets:dev
+    container: ghcr.io/sagemath/sage/sage-ubuntu-jammy-standard-with-targets:dev
     needs: [get_ci_fixes]
     steps:
       - name: Checkout
@@ -95,8 +95,8 @@ jobs:
           ./bootstrap && make sagemath_doc_html-build-deps
         working-directory: ./worktree-image
         env:
-          MAKE: make -j2 --output-sync=recurse
-          SAGE_NUM_THREADS: 2
+          MAKE: make -j4 --output-sync=recurse
+          SAGE_NUM_THREADS: 4
 
       - name: Build (fallback to non-incremental)
         id: build
@@ -106,8 +106,8 @@ jobs:
           make sagelib-clean && git clean -fx src/sage && ./config.status && make sagemath_doc_html-build-deps
         working-directory: ./worktree-image
         env:
-          MAKE: make -j2 --output-sync=recurse
-          SAGE_NUM_THREADS: 2
+          MAKE: make -j4 --output-sync=recurse
+          SAGE_NUM_THREADS: 4
 
       - name: Build docs
         id: docbuild
@@ -124,8 +124,8 @@ jobs:
           ./config.status && make sagemath_doc_html-no-deps
         working-directory: ./worktree-image
         env:
-          MAKE: make -j2 --output-sync=recurse
-          SAGE_NUM_THREADS: 2
+          MAKE: make -j4 --output-sync=recurse
+          SAGE_NUM_THREADS: 4
 
       - name: Copy docs
         id: copy
@@ -169,8 +169,8 @@ jobs:
           ./config.status && make sagemath_doc_html-no-deps sagemath_doc_pdf-no-deps
         working-directory: ./worktree-image
         env:
-          MAKE: make -j2 --output-sync=recurse
-          SAGE_NUM_THREADS: 2
+          MAKE: make -j4 --output-sync=recurse
+          SAGE_NUM_THREADS: 4
 
       - name: Copy live doc
         id: copylivedoc
diff --git a/.github/workflows/docker.yml b/.github/workflows/docker.yml
index 18910ca50a6..ccc2b07a02f 100644
--- a/.github/workflows/docker.yml
+++ b/.github/workflows/docker.yml
@@ -18,13 +18,13 @@ on:
         # 'tox -e update_docker_platforms' updates below
         default: >-
           [
-           "ubuntu-trusty-toolchain-gcc_9",
            "ubuntu-xenial-toolchain-gcc_9",
            "ubuntu-bionic-gcc_8",
            "ubuntu-focal",
            "ubuntu-jammy",
            "ubuntu-lunar",
            "ubuntu-mantic",
+           "ubuntu-noble",
            "debian-buster-gcc_spkg",
            "debian-bullseye",
            "debian-bookworm",
@@ -36,6 +36,7 @@ on:
            "linuxmint-21",
            "linuxmint-21.1",
            "linuxmint-21.2",
+           "linuxmint-21.3",
            "fedora-30",
            "fedora-31",
            "fedora-32",
@@ -46,6 +47,7 @@ on:
            "fedora-37",
            "fedora-38",
            "fedora-39",
+           "fedora-40",
            "centos-7-devtoolset-gcc_11",
            "centos-stream-8-python3.9",
            "centos-stream-9-python3.9",
@@ -53,9 +55,8 @@ on:
            "almalinux-9-python3.11",
            "gentoo-python3.10",
            "gentoo-python3.11",
+           "gentoo-python3.12",
            "archlinux-latest",
-           "opensuse-15.3-gcc_11-python3.9",
-           "opensuse-15.4-gcc_11-python3.10",
            "opensuse-15.5-gcc_11-python3.11",
            "opensuse-tumbleweed-python3.10",
            "opensuse-tumbleweed",
@@ -244,7 +245,7 @@ jobs:
         # configuration on many platforms.
         run: |
           (sleep ${{ inputs.timeout }}; for id in $(docker ps -q); do docker exec $id find /proc -maxdepth 2 -name cmdline -exec bash -c "grep -l [m][a][k][e] {} | cut -d/ -f3 | xargs --no-run-if-empty kill" \;; done) &
-          set -o pipefail; EXTRA_DOCKER_BUILD_ARGS="--build-arg NUMPROC=4 --build-arg USE_MAKEFLAGS=\"-k V=0 SAGE_NUM_THREADS=3\"" tox -e $TOX_ENV -- $TARGETS 2>&1 | sed "/^configure: notice:/s|^|::warning file=artifacts/$LOGS_ARTIFACT_NAME/config.log::|;/^configure: warning:/s|^|::warning file=artifacts/$LOGS_ARTIFACT_NAME/config.log::|;/^configure: error:/s|^|::error file=artifacts/$LOGS_ARTIFACT_NAME/config.log::|;"
+          set -o pipefail; EXTRA_DOCKER_BUILD_ARGS="--build-arg NUMPROC=9 --build-arg USE_MAKEFLAGS=\"-k V=0 SAGE_NUM_THREADS=5\"" tox -e $TOX_ENV -- $TARGETS 2>&1 | sed "/^configure: notice:/s|^|::warning file=artifacts/$LOGS_ARTIFACT_NAME/config.log::|;/^configure: warning:/s|^|::warning file=artifacts/$LOGS_ARTIFACT_NAME/config.log::|;/^configure: error:/s|^|::error file=artifacts/$LOGS_ARTIFACT_NAME/config.log::|;"
       - name: Copy logs from the Docker image or build container
         run: |
           mkdir -p "artifacts/$LOGS_ARTIFACT_NAME"
diff --git a/src/doc/en/developer/portability_platform_table.rst b/src/doc/en/developer/portability_platform_table.rst
index d024671c9d8..bf843b0a353 100644
--- a/src/doc/en/developer/portability_platform_table.rst
+++ b/src/doc/en/developer/portability_platform_table.rst
@@ -1,57 +1,3 @@
-.. |image-ubuntu-trusty-toolchain-gcc_9-minimal-with-system-packages| image:: https://ghcr-badge.egpl.dev/sagemath/sage/sage-ubuntu-trusty-toolchain-gcc_9-minimal-with-system-packages/size?tag=dev&label=with-system-packages&color=%23696969
-   :target: https://ghcr.io/sagemath/sage/sage-ubuntu-trusty-toolchain-gcc_9-minimal-with-system-packages
-
-.. |image-ubuntu-trusty-toolchain-gcc_9-minimal-configured| image:: https://ghcr-badge.egpl.dev/sagemath/sage/sage-ubuntu-trusty-toolchain-gcc_9-minimal-configured/latest_tag?ignore=latest,dev,*-failed&label=configured&color=%23696969
-   :target: https://ghcr.io/sagemath/sage/sage-ubuntu-trusty-toolchain-gcc_9-minimal-configured
-
-.. |image-ubuntu-trusty-toolchain-gcc_9-minimal-with-targets-pre| image:: https://ghcr-badge.egpl.dev/sagemath/sage/sage-ubuntu-trusty-toolchain-gcc_9-minimal-with-targets-pre/latest_tag?ignore=latest,dev,*-failed&label=with-targets-pre&color=%23677895
-   :target: https://ghcr.io/sagemath/sage/sage-ubuntu-trusty-toolchain-gcc_9-minimal-with-targets-pre
-
-.. |image-ubuntu-trusty-toolchain-gcc_9-minimal-with-targets| image:: https://ghcr-badge.egpl.dev/sagemath/sage/sage-ubuntu-trusty-toolchain-gcc_9-minimal-with-targets/latest_tag?ignore=latest,dev,*-failed&label=with-targets&color=%236686c1
-   :target: https://ghcr.io/sagemath/sage/sage-ubuntu-trusty-toolchain-gcc_9-minimal-with-targets
-
-.. |image-ubuntu-trusty-toolchain-gcc_9-minimal-with-targets-optional| image:: https://ghcr-badge.egpl.dev/sagemath/sage/sage-ubuntu-trusty-toolchain-gcc_9-minimal-with-targets-optional/latest_tag?ignore=latest,dev,*-failed&label=with-targets-optional&color=%236495ed
-   :target: https://ghcr.io/sagemath/sage/sage-ubuntu-trusty-toolchain-gcc_9-minimal-with-targets-optional
-
-.. |codespace-ubuntu-trusty-toolchain-gcc_9-minimal| image:: https://github.com/codespaces/badge.svg
-   :target: https://codespaces.new/sagemath/sage?devcontainer_path=.devcontainer%2Fportability-ubuntu-trusty-toolchain-gcc_9-minimal%2Fdevcontainer.json
-
-.. |image-ubuntu-trusty-toolchain-gcc_9-standard-with-system-packages| image:: https://ghcr-badge.egpl.dev/sagemath/sage/sage-ubuntu-trusty-toolchain-gcc_9-standard-with-system-packages/size?tag=dev&label=with-system-packages&color=%23696969
-   :target: https://ghcr.io/sagemath/sage/sage-ubuntu-trusty-toolchain-gcc_9-standard-with-system-packages
-
-.. |image-ubuntu-trusty-toolchain-gcc_9-standard-configured| image:: https://ghcr-badge.egpl.dev/sagemath/sage/sage-ubuntu-trusty-toolchain-gcc_9-standard-configured/latest_tag?ignore=latest,dev,*-failed&label=configured&color=%23696969
-   :target: https://ghcr.io/sagemath/sage/sage-ubuntu-trusty-toolchain-gcc_9-standard-configured
-
-.. |image-ubuntu-trusty-toolchain-gcc_9-standard-with-targets-pre| image:: https://ghcr-badge.egpl.dev/sagemath/sage/sage-ubuntu-trusty-toolchain-gcc_9-standard-with-targets-pre/latest_tag?ignore=latest,dev,*-failed&label=with-targets-pre&color=%235d8a4c
-   :target: https://ghcr.io/sagemath/sage/sage-ubuntu-trusty-toolchain-gcc_9-standard-with-targets-pre
-
-.. |image-ubuntu-trusty-toolchain-gcc_9-standard-with-targets| image:: https://ghcr-badge.egpl.dev/sagemath/sage/sage-ubuntu-trusty-toolchain-gcc_9-standard-with-targets/latest_tag?ignore=latest,dev,*-failed&label=with-targets&color=%2350ab2e
-   :target: https://ghcr.io/sagemath/sage/sage-ubuntu-trusty-toolchain-gcc_9-standard-with-targets
-
-.. |image-ubuntu-trusty-toolchain-gcc_9-standard-with-targets-optional| image:: https://ghcr-badge.egpl.dev/sagemath/sage/sage-ubuntu-trusty-toolchain-gcc_9-standard-with-targets-optional/latest_tag?ignore=latest,dev,*-failed&label=with-targets-optional&color=%2344cc11
-   :target: https://ghcr.io/sagemath/sage/sage-ubuntu-trusty-toolchain-gcc_9-standard-with-targets-optional
-
-.. |codespace-ubuntu-trusty-toolchain-gcc_9-standard| image:: https://github.com/codespaces/badge.svg
-   :target: https://codespaces.new/sagemath/sage?devcontainer_path=.devcontainer%2Fportability-ubuntu-trusty-toolchain-gcc_9-standard%2Fdevcontainer.json
-
-.. |image-ubuntu-trusty-toolchain-gcc_9-maximal-with-system-packages| image:: https://ghcr-badge.egpl.dev/sagemath/sage/sage-ubuntu-trusty-toolchain-gcc_9-maximal-with-system-packages/size?tag=dev&label=with-system-packages&color=%23696969
-   :target: https://ghcr.io/sagemath/sage/sage-ubuntu-trusty-toolchain-gcc_9-maximal-with-system-packages
-
-.. |image-ubuntu-trusty-toolchain-gcc_9-maximal-configured| image:: https://ghcr-badge.egpl.dev/sagemath/sage/sage-ubuntu-trusty-toolchain-gcc_9-maximal-configured/latest_tag?ignore=latest,dev,*-failed&label=configured&color=%23696969
-   :target: https://ghcr.io/sagemath/sage/sage-ubuntu-trusty-toolchain-gcc_9-maximal-configured
-
-.. |image-ubuntu-trusty-toolchain-gcc_9-maximal-with-targets-pre| image:: https://ghcr-badge.egpl.dev/sagemath/sage/sage-ubuntu-trusty-toolchain-gcc_9-maximal-with-targets-pre/latest_tag?ignore=latest,dev,*-failed&label=with-targets-pre&color=%238f6b8d
-   :target: https://ghcr.io/sagemath/sage/sage-ubuntu-trusty-toolchain-gcc_9-maximal-with-targets-pre
-
-.. |image-ubuntu-trusty-toolchain-gcc_9-maximal-with-targets| image:: https://ghcr-badge.egpl.dev/sagemath/sage/sage-ubuntu-trusty-toolchain-gcc_9-maximal-with-targets/latest_tag?ignore=latest,dev,*-failed&label=with-targets&color=%23b46eb2
-   :target: https://ghcr.io/sagemath/sage/sage-ubuntu-trusty-toolchain-gcc_9-maximal-with-targets
-
-.. |image-ubuntu-trusty-toolchain-gcc_9-maximal-with-targets-optional| image:: https://ghcr-badge.egpl.dev/sagemath/sage/sage-ubuntu-trusty-toolchain-gcc_9-maximal-with-targets-optional/latest_tag?ignore=latest,dev,*-failed&label=with-targets-optional&color=%23da70d6
-   :target: https://ghcr.io/sagemath/sage/sage-ubuntu-trusty-toolchain-gcc_9-maximal-with-targets-optional
-
-.. |codespace-ubuntu-trusty-toolchain-gcc_9-maximal| image:: https://github.com/codespaces/badge.svg
-   :target: https://codespaces.new/sagemath/sage?devcontainer_path=.devcontainer%2Fportability-ubuntu-trusty-toolchain-gcc_9-maximal%2Fdevcontainer.json
-
 .. |image-ubuntu-xenial-toolchain-gcc_9-minimal-with-system-packages| image:: https://ghcr-badge.egpl.dev/sagemath/sage/sage-ubuntu-xenial-toolchain-gcc_9-minimal-with-system-packages/size?tag=dev&label=with-system-packages&color=%23696969
    :target: https://ghcr.io/sagemath/sage/sage-ubuntu-xenial-toolchain-gcc_9-minimal-with-system-packages
 
@@ -376,6 +322,60 @@
 .. |codespace-ubuntu-mantic-maximal| image:: https://github.com/codespaces/badge.svg
    :target: https://codespaces.new/sagemath/sage?devcontainer_path=.devcontainer%2Fportability-ubuntu-mantic-maximal%2Fdevcontainer.json
 
+.. |image-ubuntu-noble-minimal-with-system-packages| image:: https://ghcr-badge.egpl.dev/sagemath/sage/sage-ubuntu-noble-minimal-with-system-packages/size?tag=dev&label=with-system-packages&color=%23696969
+   :target: https://ghcr.io/sagemath/sage/sage-ubuntu-noble-minimal-with-system-packages
+
+.. |image-ubuntu-noble-minimal-configured| image:: https://ghcr-badge.egpl.dev/sagemath/sage/sage-ubuntu-noble-minimal-configured/latest_tag?ignore=latest,dev,*-failed&label=configured&color=%23696969
+   :target: https://ghcr.io/sagemath/sage/sage-ubuntu-noble-minimal-configured
+
+.. |image-ubuntu-noble-minimal-with-targets-pre| image:: https://ghcr-badge.egpl.dev/sagemath/sage/sage-ubuntu-noble-minimal-with-targets-pre/latest_tag?ignore=latest,dev,*-failed&label=with-targets-pre&color=%23677895
+   :target: https://ghcr.io/sagemath/sage/sage-ubuntu-noble-minimal-with-targets-pre
+
+.. |image-ubuntu-noble-minimal-with-targets| image:: https://ghcr-badge.egpl.dev/sagemath/sage/sage-ubuntu-noble-minimal-with-targets/latest_tag?ignore=latest,dev,*-failed&label=with-targets&color=%236686c1
+   :target: https://ghcr.io/sagemath/sage/sage-ubuntu-noble-minimal-with-targets
+
+.. |image-ubuntu-noble-minimal-with-targets-optional| image:: https://ghcr-badge.egpl.dev/sagemath/sage/sage-ubuntu-noble-minimal-with-targets-optional/latest_tag?ignore=latest,dev,*-failed&label=with-targets-optional&color=%236495ed
+   :target: https://ghcr.io/sagemath/sage/sage-ubuntu-noble-minimal-with-targets-optional
+
+.. |codespace-ubuntu-noble-minimal| image:: https://github.com/codespaces/badge.svg
+   :target: https://codespaces.new/sagemath/sage?devcontainer_path=.devcontainer%2Fportability-ubuntu-noble-minimal%2Fdevcontainer.json
+
+.. |image-ubuntu-noble-standard-with-system-packages| image:: https://ghcr-badge.egpl.dev/sagemath/sage/sage-ubuntu-noble-standard-with-system-packages/size?tag=dev&label=with-system-packages&color=%23696969
+   :target: https://ghcr.io/sagemath/sage/sage-ubuntu-noble-standard-with-system-packages
+
+.. |image-ubuntu-noble-standard-configured| image:: https://ghcr-badge.egpl.dev/sagemath/sage/sage-ubuntu-noble-standard-configured/latest_tag?ignore=latest,dev,*-failed&label=configured&color=%23696969
+   :target: https://ghcr.io/sagemath/sage/sage-ubuntu-noble-standard-configured
+
+.. |image-ubuntu-noble-standard-with-targets-pre| image:: https://ghcr-badge.egpl.dev/sagemath/sage/sage-ubuntu-noble-standard-with-targets-pre/latest_tag?ignore=latest,dev,*-failed&label=with-targets-pre&color=%235d8a4c
+   :target: https://ghcr.io/sagemath/sage/sage-ubuntu-noble-standard-with-targets-pre
+
+.. |image-ubuntu-noble-standard-with-targets| image:: https://ghcr-badge.egpl.dev/sagemath/sage/sage-ubuntu-noble-standard-with-targets/latest_tag?ignore=latest,dev,*-failed&label=with-targets&color=%2350ab2e
+   :target: https://ghcr.io/sagemath/sage/sage-ubuntu-noble-standard-with-targets
+
+.. |image-ubuntu-noble-standard-with-targets-optional| image:: https://ghcr-badge.egpl.dev/sagemath/sage/sage-ubuntu-noble-standard-with-targets-optional/latest_tag?ignore=latest,dev,*-failed&label=with-targets-optional&color=%2344cc11
+   :target: https://ghcr.io/sagemath/sage/sage-ubuntu-noble-standard-with-targets-optional
+
+.. |codespace-ubuntu-noble-standard| image:: https://github.com/codespaces/badge.svg
+   :target: https://codespaces.new/sagemath/sage?devcontainer_path=.devcontainer%2Fportability-ubuntu-noble-standard%2Fdevcontainer.json
+
+.. |image-ubuntu-noble-maximal-with-system-packages| image:: https://ghcr-badge.egpl.dev/sagemath/sage/sage-ubuntu-noble-maximal-with-system-packages/size?tag=dev&label=with-system-packages&color=%23696969
+   :target: https://ghcr.io/sagemath/sage/sage-ubuntu-noble-maximal-with-system-packages
+
+.. |image-ubuntu-noble-maximal-configured| image:: https://ghcr-badge.egpl.dev/sagemath/sage/sage-ubuntu-noble-maximal-configured/latest_tag?ignore=latest,dev,*-failed&label=configured&color=%23696969
+   :target: https://ghcr.io/sagemath/sage/sage-ubuntu-noble-maximal-configured
+
+.. |image-ubuntu-noble-maximal-with-targets-pre| image:: https://ghcr-badge.egpl.dev/sagemath/sage/sage-ubuntu-noble-maximal-with-targets-pre/latest_tag?ignore=latest,dev,*-failed&label=with-targets-pre&color=%238f6b8d
+   :target: https://ghcr.io/sagemath/sage/sage-ubuntu-noble-maximal-with-targets-pre
+
+.. |image-ubuntu-noble-maximal-with-targets| image:: https://ghcr-badge.egpl.dev/sagemath/sage/sage-ubuntu-noble-maximal-with-targets/latest_tag?ignore=latest,dev,*-failed&label=with-targets&color=%23b46eb2
+   :target: https://ghcr.io/sagemath/sage/sage-ubuntu-noble-maximal-with-targets
+
+.. |image-ubuntu-noble-maximal-with-targets-optional| image:: https://ghcr-badge.egpl.dev/sagemath/sage/sage-ubuntu-noble-maximal-with-targets-optional/latest_tag?ignore=latest,dev,*-failed&label=with-targets-optional&color=%23da70d6
+   :target: https://ghcr.io/sagemath/sage/sage-ubuntu-noble-maximal-with-targets-optional
+
+.. |codespace-ubuntu-noble-maximal| image:: https://github.com/codespaces/badge.svg
+   :target: https://codespaces.new/sagemath/sage?devcontainer_path=.devcontainer%2Fportability-ubuntu-noble-maximal%2Fdevcontainer.json
+
 .. |image-debian-buster-gcc_spkg-minimal-with-system-packages| image:: https://ghcr-badge.egpl.dev/sagemath/sage/sage-debian-buster-gcc_spkg-minimal-with-system-packages/size?tag=dev&label=with-system-packages&color=%23696969
    :target: https://ghcr.io/sagemath/sage/sage-debian-buster-gcc_spkg-minimal-with-system-packages
 
@@ -970,6 +970,60 @@
 .. |codespace-linuxmint-21.2-maximal| image:: https://github.com/codespaces/badge.svg
    :target: https://codespaces.new/sagemath/sage?devcontainer_path=.devcontainer%2Fportability-linuxmint-21.2-maximal%2Fdevcontainer.json
 
+.. |image-linuxmint-21.3-minimal-with-system-packages| image:: https://ghcr-badge.egpl.dev/sagemath/sage/sage-linuxmint-21.3-minimal-with-system-packages/size?tag=dev&label=with-system-packages&color=%23696969
+   :target: https://ghcr.io/sagemath/sage/sage-linuxmint-21.3-minimal-with-system-packages
+
+.. |image-linuxmint-21.3-minimal-configured| image:: https://ghcr-badge.egpl.dev/sagemath/sage/sage-linuxmint-21.3-minimal-configured/latest_tag?ignore=latest,dev,*-failed&label=configured&color=%23696969
+   :target: https://ghcr.io/sagemath/sage/sage-linuxmint-21.3-minimal-configured
+
+.. |image-linuxmint-21.3-minimal-with-targets-pre| image:: https://ghcr-badge.egpl.dev/sagemath/sage/sage-linuxmint-21.3-minimal-with-targets-pre/latest_tag?ignore=latest,dev,*-failed&label=with-targets-pre&color=%23677895
+   :target: https://ghcr.io/sagemath/sage/sage-linuxmint-21.3-minimal-with-targets-pre
+
+.. |image-linuxmint-21.3-minimal-with-targets| image:: https://ghcr-badge.egpl.dev/sagemath/sage/sage-linuxmint-21.3-minimal-with-targets/latest_tag?ignore=latest,dev,*-failed&label=with-targets&color=%236686c1
+   :target: https://ghcr.io/sagemath/sage/sage-linuxmint-21.3-minimal-with-targets
+
+.. |image-linuxmint-21.3-minimal-with-targets-optional| image:: https://ghcr-badge.egpl.dev/sagemath/sage/sage-linuxmint-21.3-minimal-with-targets-optional/latest_tag?ignore=latest,dev,*-failed&label=with-targets-optional&color=%236495ed
+   :target: https://ghcr.io/sagemath/sage/sage-linuxmint-21.3-minimal-with-targets-optional
+
+.. |codespace-linuxmint-21.3-minimal| image:: https://github.com/codespaces/badge.svg
+   :target: https://codespaces.new/sagemath/sage?devcontainer_path=.devcontainer%2Fportability-linuxmint-21.3-minimal%2Fdevcontainer.json
+
+.. |image-linuxmint-21.3-standard-with-system-packages| image:: https://ghcr-badge.egpl.dev/sagemath/sage/sage-linuxmint-21.3-standard-with-system-packages/size?tag=dev&label=with-system-packages&color=%23696969
+   :target: https://ghcr.io/sagemath/sage/sage-linuxmint-21.3-standard-with-system-packages
+
+.. |image-linuxmint-21.3-standard-configured| image:: https://ghcr-badge.egpl.dev/sagemath/sage/sage-linuxmint-21.3-standard-configured/latest_tag?ignore=latest,dev,*-failed&label=configured&color=%23696969
+   :target: https://ghcr.io/sagemath/sage/sage-linuxmint-21.3-standard-configured
+
+.. |image-linuxmint-21.3-standard-with-targets-pre| image:: https://ghcr-badge.egpl.dev/sagemath/sage/sage-linuxmint-21.3-standard-with-targets-pre/latest_tag?ignore=latest,dev,*-failed&label=with-targets-pre&color=%235d8a4c
+   :target: https://ghcr.io/sagemath/sage/sage-linuxmint-21.3-standard-with-targets-pre
+
+.. |image-linuxmint-21.3-standard-with-targets| image:: https://ghcr-badge.egpl.dev/sagemath/sage/sage-linuxmint-21.3-standard-with-targets/latest_tag?ignore=latest,dev,*-failed&label=with-targets&color=%2350ab2e
+   :target: https://ghcr.io/sagemath/sage/sage-linuxmint-21.3-standard-with-targets
+
+.. |image-linuxmint-21.3-standard-with-targets-optional| image:: https://ghcr-badge.egpl.dev/sagemath/sage/sage-linuxmint-21.3-standard-with-targets-optional/latest_tag?ignore=latest,dev,*-failed&label=with-targets-optional&color=%2344cc11
+   :target: https://ghcr.io/sagemath/sage/sage-linuxmint-21.3-standard-with-targets-optional
+
+.. |codespace-linuxmint-21.3-standard| image:: https://github.com/codespaces/badge.svg
+   :target: https://codespaces.new/sagemath/sage?devcontainer_path=.devcontainer%2Fportability-linuxmint-21.3-standard%2Fdevcontainer.json
+
+.. |image-linuxmint-21.3-maximal-with-system-packages| image:: https://ghcr-badge.egpl.dev/sagemath/sage/sage-linuxmint-21.3-maximal-with-system-packages/size?tag=dev&label=with-system-packages&color=%23696969
+   :target: https://ghcr.io/sagemath/sage/sage-linuxmint-21.3-maximal-with-system-packages
+
+.. |image-linuxmint-21.3-maximal-configured| image:: https://ghcr-badge.egpl.dev/sagemath/sage/sage-linuxmint-21.3-maximal-configured/latest_tag?ignore=latest,dev,*-failed&label=configured&color=%23696969
+   :target: https://ghcr.io/sagemath/sage/sage-linuxmint-21.3-maximal-configured
+
+.. |image-linuxmint-21.3-maximal-with-targets-pre| image:: https://ghcr-badge.egpl.dev/sagemath/sage/sage-linuxmint-21.3-maximal-with-targets-pre/latest_tag?ignore=latest,dev,*-failed&label=with-targets-pre&color=%238f6b8d
+   :target: https://ghcr.io/sagemath/sage/sage-linuxmint-21.3-maximal-with-targets-pre
+
+.. |image-linuxmint-21.3-maximal-with-targets| image:: https://ghcr-badge.egpl.dev/sagemath/sage/sage-linuxmint-21.3-maximal-with-targets/latest_tag?ignore=latest,dev,*-failed&label=with-targets&color=%23b46eb2
+   :target: https://ghcr.io/sagemath/sage/sage-linuxmint-21.3-maximal-with-targets
+
+.. |image-linuxmint-21.3-maximal-with-targets-optional| image:: https://ghcr-badge.egpl.dev/sagemath/sage/sage-linuxmint-21.3-maximal-with-targets-optional/latest_tag?ignore=latest,dev,*-failed&label=with-targets-optional&color=%23da70d6
+   :target: https://ghcr.io/sagemath/sage/sage-linuxmint-21.3-maximal-with-targets-optional
+
+.. |codespace-linuxmint-21.3-maximal| image:: https://github.com/codespaces/badge.svg
+   :target: https://codespaces.new/sagemath/sage?devcontainer_path=.devcontainer%2Fportability-linuxmint-21.3-maximal%2Fdevcontainer.json
+
 .. |image-fedora-30-minimal-with-system-packages| image:: https://ghcr-badge.egpl.dev/sagemath/sage/sage-fedora-30-minimal-with-system-packages/size?tag=dev&label=with-system-packages&color=%23696969
    :target: https://ghcr.io/sagemath/sage/sage-fedora-30-minimal-with-system-packages
 
@@ -1510,6 +1564,60 @@
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    :target: https://codespaces.new/sagemath/sage?devcontainer_path=.devcontainer%2Fportability-fedora-39-maximal%2Fdevcontainer.json
 
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-   :target: https://codespaces.new/sagemath/sage?devcontainer_path=.devcontainer%2Fportability-opensuse-15.4-gcc_11-python3.10-minimal%2Fdevcontainer.json
-
-.. |image-opensuse-15.4-gcc_11-python3.10-standard-with-system-packages| image:: https://ghcr-badge.egpl.dev/sagemath/sage/sage-opensuse-15.4-gcc_11-python3.10-standard-with-system-packages/size?tag=dev&label=with-system-packages&color=%23696969
-   :target: https://ghcr.io/sagemath/sage/sage-opensuse-15.4-gcc_11-python3.10-standard-with-system-packages
-
-.. |image-opensuse-15.4-gcc_11-python3.10-standard-configured| image:: https://ghcr-badge.egpl.dev/sagemath/sage/sage-opensuse-15.4-gcc_11-python3.10-standard-configured/latest_tag?ignore=latest,dev,*-failed&label=configured&color=%23696969
-   :target: https://ghcr.io/sagemath/sage/sage-opensuse-15.4-gcc_11-python3.10-standard-configured
-
-.. |image-opensuse-15.4-gcc_11-python3.10-standard-with-targets-pre| image:: https://ghcr-badge.egpl.dev/sagemath/sage/sage-opensuse-15.4-gcc_11-python3.10-standard-with-targets-pre/latest_tag?ignore=latest,dev,*-failed&label=with-targets-pre&color=%235d8a4c
-   :target: https://ghcr.io/sagemath/sage/sage-opensuse-15.4-gcc_11-python3.10-standard-with-targets-pre
-
-.. |image-opensuse-15.4-gcc_11-python3.10-standard-with-targets| image:: https://ghcr-badge.egpl.dev/sagemath/sage/sage-opensuse-15.4-gcc_11-python3.10-standard-with-targets/latest_tag?ignore=latest,dev,*-failed&label=with-targets&color=%2350ab2e
-   :target: https://ghcr.io/sagemath/sage/sage-opensuse-15.4-gcc_11-python3.10-standard-with-targets
-
-.. |image-opensuse-15.4-gcc_11-python3.10-standard-with-targets-optional| image:: https://ghcr-badge.egpl.dev/sagemath/sage/sage-opensuse-15.4-gcc_11-python3.10-standard-with-targets-optional/latest_tag?ignore=latest,dev,*-failed&label=with-targets-optional&color=%2344cc11
-   :target: https://ghcr.io/sagemath/sage/sage-opensuse-15.4-gcc_11-python3.10-standard-with-targets-optional
-
-.. |codespace-opensuse-15.4-gcc_11-python3.10-standard| image:: https://github.com/codespaces/badge.svg
-   :target: https://codespaces.new/sagemath/sage?devcontainer_path=.devcontainer%2Fportability-opensuse-15.4-gcc_11-python3.10-standard%2Fdevcontainer.json
-
-.. |image-opensuse-15.4-gcc_11-python3.10-maximal-with-system-packages| image:: https://ghcr-badge.egpl.dev/sagemath/sage/sage-opensuse-15.4-gcc_11-python3.10-maximal-with-system-packages/size?tag=dev&label=with-system-packages&color=%23696969
-   :target: https://ghcr.io/sagemath/sage/sage-opensuse-15.4-gcc_11-python3.10-maximal-with-system-packages
-
-.. |image-opensuse-15.4-gcc_11-python3.10-maximal-configured| image:: https://ghcr-badge.egpl.dev/sagemath/sage/sage-opensuse-15.4-gcc_11-python3.10-maximal-configured/latest_tag?ignore=latest,dev,*-failed&label=configured&color=%23696969
-   :target: https://ghcr.io/sagemath/sage/sage-opensuse-15.4-gcc_11-python3.10-maximal-configured
-
-.. |image-opensuse-15.4-gcc_11-python3.10-maximal-with-targets-pre| image:: https://ghcr-badge.egpl.dev/sagemath/sage/sage-opensuse-15.4-gcc_11-python3.10-maximal-with-targets-pre/latest_tag?ignore=latest,dev,*-failed&label=with-targets-pre&color=%238f6b8d
-   :target: https://ghcr.io/sagemath/sage/sage-opensuse-15.4-gcc_11-python3.10-maximal-with-targets-pre
-
-.. |image-opensuse-15.4-gcc_11-python3.10-maximal-with-targets| image:: https://ghcr-badge.egpl.dev/sagemath/sage/sage-opensuse-15.4-gcc_11-python3.10-maximal-with-targets/latest_tag?ignore=latest,dev,*-failed&label=with-targets&color=%23b46eb2
-   :target: https://ghcr.io/sagemath/sage/sage-opensuse-15.4-gcc_11-python3.10-maximal-with-targets
-
-.. |image-opensuse-15.4-gcc_11-python3.10-maximal-with-targets-optional| image:: https://ghcr-badge.egpl.dev/sagemath/sage/sage-opensuse-15.4-gcc_11-python3.10-maximal-with-targets-optional/latest_tag?ignore=latest,dev,*-failed&label=with-targets-optional&color=%23da70d6
-   :target: https://ghcr.io/sagemath/sage/sage-opensuse-15.4-gcc_11-python3.10-maximal-with-targets-optional
-
-.. |codespace-opensuse-15.4-gcc_11-python3.10-maximal| image:: https://github.com/codespaces/badge.svg
-   :target: https://codespaces.new/sagemath/sage?devcontainer_path=.devcontainer%2Fportability-opensuse-15.4-gcc_11-python3.10-maximal%2Fdevcontainer.json
-
 .. |image-opensuse-15.5-gcc_11-python3.11-minimal-with-system-packages| image:: https://ghcr-badge.egpl.dev/sagemath/sage/sage-opensuse-15.5-gcc_11-python3.11-minimal-with-system-packages/size?tag=dev&label=with-system-packages&color=%23696969
    :target: https://ghcr.io/sagemath/sage/sage-opensuse-15.5-gcc_11-python3.11-minimal-with-system-packages
 
@@ -2382,17 +2436,6 @@
    * - Platform
      - Images
      - 
-   * - **ubuntu**-trusty-toolchain-gcc_9 
-       
-          ‑*minimal*
-     - |image-ubuntu-trusty-toolchain-gcc_9-minimal-with-system-packages| |image-ubuntu-trusty-toolchain-gcc_9-minimal-with-targets-pre| |image-ubuntu-trusty-toolchain-gcc_9-minimal-with-targets| |image-ubuntu-trusty-toolchain-gcc_9-minimal-with-targets-optional|
-     - |codespace-ubuntu-trusty-toolchain-gcc_9-minimal|
-   * -    ‑*standard*
-     - |image-ubuntu-trusty-toolchain-gcc_9-standard-with-system-packages| |image-ubuntu-trusty-toolchain-gcc_9-standard-with-targets-pre| |image-ubuntu-trusty-toolchain-gcc_9-standard-with-targets| |image-ubuntu-trusty-toolchain-gcc_9-standard-with-targets-optional|
-     - |codespace-ubuntu-trusty-toolchain-gcc_9-standard|
-   * -    ‑*maximal*
-     - |image-ubuntu-trusty-toolchain-gcc_9-maximal-with-system-packages| |image-ubuntu-trusty-toolchain-gcc_9-maximal-with-targets-pre|
-     -
    * - **ubuntu**-xenial-toolchain-gcc_9 
        
           ‑*minimal*
@@ -2459,6 +2502,17 @@
    * -    ‑*maximal*
      - |image-ubuntu-mantic-maximal-with-system-packages| |image-ubuntu-mantic-maximal-with-targets-pre|
      -
+   * - **ubuntu**-noble 
+       
+          ‑*minimal*
+     - |image-ubuntu-noble-minimal-with-system-packages| |image-ubuntu-noble-minimal-with-targets-pre| |image-ubuntu-noble-minimal-with-targets| |image-ubuntu-noble-minimal-with-targets-optional|
+     - |codespace-ubuntu-noble-minimal|
+   * -    ‑*standard*
+     - |image-ubuntu-noble-standard-with-system-packages| |image-ubuntu-noble-standard-with-targets-pre| |image-ubuntu-noble-standard-with-targets| |image-ubuntu-noble-standard-with-targets-optional|
+     - |codespace-ubuntu-noble-standard|
+   * -    ‑*maximal*
+     - |image-ubuntu-noble-maximal-with-system-packages| |image-ubuntu-noble-maximal-with-targets-pre|
+     -
    * - **debian**-buster-gcc_spkg 
        
           ‑*minimal*
@@ -2580,6 +2634,17 @@
    * -    ‑*maximal*
      - |image-linuxmint-21.2-maximal-with-system-packages| |image-linuxmint-21.2-maximal-with-targets-pre|
      -
+   * - **linuxmint**-21.3 
+       
+          ‑*minimal*
+     - |image-linuxmint-21.3-minimal-with-system-packages| |image-linuxmint-21.3-minimal-with-targets-pre| |image-linuxmint-21.3-minimal-with-targets| |image-linuxmint-21.3-minimal-with-targets-optional|
+     - |codespace-linuxmint-21.3-minimal|
+   * -    ‑*standard*
+     - |image-linuxmint-21.3-standard-with-system-packages| |image-linuxmint-21.3-standard-with-targets-pre| |image-linuxmint-21.3-standard-with-targets| |image-linuxmint-21.3-standard-with-targets-optional|
+     - |codespace-linuxmint-21.3-standard|
+   * -    ‑*maximal*
+     - |image-linuxmint-21.3-maximal-with-system-packages| |image-linuxmint-21.3-maximal-with-targets-pre|
+     -
    * - **fedora**-30 
        
           ‑*minimal*
@@ -2690,6 +2755,17 @@
    * -    ‑*maximal*
      - |image-fedora-39-maximal-with-system-packages| |image-fedora-39-maximal-with-targets-pre|
      -
+   * - **fedora**-40 
+       
+          ‑*minimal*
+     - |image-fedora-40-minimal-with-system-packages| |image-fedora-40-minimal-with-targets-pre| |image-fedora-40-minimal-with-targets| |image-fedora-40-minimal-with-targets-optional|
+     - |codespace-fedora-40-minimal|
+   * -    ‑*standard*
+     - |image-fedora-40-standard-with-system-packages| |image-fedora-40-standard-with-targets-pre| |image-fedora-40-standard-with-targets| |image-fedora-40-standard-with-targets-optional|
+     - |codespace-fedora-40-standard|
+   * -    ‑*maximal*
+     - |image-fedora-40-maximal-with-system-packages| |image-fedora-40-maximal-with-targets-pre|
+     -
    * - **centos**-7-devtoolset-gcc_11 
        
           ‑*minimal*
@@ -2767,6 +2843,17 @@
    * -    ‑*maximal*
      - |image-gentoo-python3.11-maximal-with-system-packages| |image-gentoo-python3.11-maximal-with-targets-pre|
      -
+   * - **gentoo**-python3.12 
+       
+          ‑*minimal*
+     - |image-gentoo-python3.12-minimal-with-system-packages| |image-gentoo-python3.12-minimal-with-targets-pre| |image-gentoo-python3.12-minimal-with-targets| |image-gentoo-python3.12-minimal-with-targets-optional|
+     - |codespace-gentoo-python3.12-minimal|
+   * -    ‑*standard*
+     - |image-gentoo-python3.12-standard-with-system-packages| |image-gentoo-python3.12-standard-with-targets-pre| |image-gentoo-python3.12-standard-with-targets| |image-gentoo-python3.12-standard-with-targets-optional|
+     - |codespace-gentoo-python3.12-standard|
+   * -    ‑*maximal*
+     - |image-gentoo-python3.12-maximal-with-system-packages| |image-gentoo-python3.12-maximal-with-targets-pre|
+     -
    * - **archlinux**-latest 
        
           ‑*minimal*
@@ -2778,28 +2865,6 @@
    * -    ‑*maximal*
      - |image-archlinux-latest-maximal-with-system-packages| |image-archlinux-latest-maximal-with-targets-pre|
      -
-   * - **opensuse**-15.3-gcc_11-python3.9 
-       
-          ‑*minimal*
-     - |image-opensuse-15.3-gcc_11-python3.9-minimal-with-system-packages| |image-opensuse-15.3-gcc_11-python3.9-minimal-with-targets-pre| |image-opensuse-15.3-gcc_11-python3.9-minimal-with-targets| |image-opensuse-15.3-gcc_11-python3.9-minimal-with-targets-optional|
-     - |codespace-opensuse-15.3-gcc_11-python3.9-minimal|
-   * -    ‑*standard*
-     - |image-opensuse-15.3-gcc_11-python3.9-standard-with-system-packages| |image-opensuse-15.3-gcc_11-python3.9-standard-with-targets-pre| |image-opensuse-15.3-gcc_11-python3.9-standard-with-targets| |image-opensuse-15.3-gcc_11-python3.9-standard-with-targets-optional|
-     - |codespace-opensuse-15.3-gcc_11-python3.9-standard|
-   * -    ‑*maximal*
-     - |image-opensuse-15.3-gcc_11-python3.9-maximal-with-system-packages| |image-opensuse-15.3-gcc_11-python3.9-maximal-with-targets-pre|
-     -
-   * - **opensuse**-15.4-gcc_11-python3.10 
-       
-          ‑*minimal*
-     - |image-opensuse-15.4-gcc_11-python3.10-minimal-with-system-packages| |image-opensuse-15.4-gcc_11-python3.10-minimal-with-targets-pre| |image-opensuse-15.4-gcc_11-python3.10-minimal-with-targets| |image-opensuse-15.4-gcc_11-python3.10-minimal-with-targets-optional|
-     - |codespace-opensuse-15.4-gcc_11-python3.10-minimal|
-   * -    ‑*standard*
-     - |image-opensuse-15.4-gcc_11-python3.10-standard-with-system-packages| |image-opensuse-15.4-gcc_11-python3.10-standard-with-targets-pre| |image-opensuse-15.4-gcc_11-python3.10-standard-with-targets| |image-opensuse-15.4-gcc_11-python3.10-standard-with-targets-optional|
-     - |codespace-opensuse-15.4-gcc_11-python3.10-standard|
-   * -    ‑*maximal*
-     - |image-opensuse-15.4-gcc_11-python3.10-maximal-with-system-packages| |image-opensuse-15.4-gcc_11-python3.10-maximal-with-targets-pre|
-     -
    * - **opensuse**-15.5-gcc_11-python3.11 
        
           ‑*minimal*
diff --git a/tox.ini b/tox.ini
index 99d04aad388..71a38cfec82 100644
--- a/tox.ini
+++ b/tox.ini
@@ -205,8 +205,9 @@ setenv =
     docker:           BASE_TAG=latest
     #
     # https://hub.docker.com/_/ubuntu?tab=description
-    # as of 2023-05, latest=jammy=22.04, rolling=lunar=23.04, devel=mantic=23.10
+    # as of 2024-02, latest=jammy=22.04, rolling=mantic=23.10, devel=noble=24.04
     # ubuntu-focal does not have libgap-dev
+    # ubuntu-noble does not have libbrial-dev
     #
     ubuntu:         SYSTEM=debian
     ubuntu:         BASE_IMAGE=ubuntu
@@ -226,6 +227,8 @@ setenv =
     ubuntu-jammy:     BASE_TAG=jammy
     ubuntu-lunar:     BASE_TAG=lunar
     ubuntu-mantic:    BASE_TAG=mantic
+    ubuntu-noble:     BASE_TAG=noble
+    ubuntu-noble:                              IGNORE_MISSING_SYSTEM_PACKAGES=yes
     #
     # https://hub.docker.com/_/debian
     # debian-buster does not have libfreetype-dev (it only has libfreetype6-dev)
@@ -264,6 +267,7 @@ setenv =
     linuxmint-21:   BASE_IMAGE=linuxmintd/mint21
     linuxmint-21.1: BASE_IMAGE=linuxmintd/mint21.1
     linuxmint-21.2: BASE_IMAGE=linuxmintd/mint21.2
+    linuxmint-21.3: BASE_IMAGE=linuxmintd/mint21.3
     #
     # https://hub.docker.com/_/fedora
     # as of 2024-01, latest=39, rawhide=40
@@ -848,16 +852,16 @@ setenv =
     # Master list of platforms tested in CI Linux
     #
     DEFAULT_SYSTEM_FACTORS=\
-                     ubuntu-{trusty-toolchain-gcc_9,xenial-toolchain-gcc_9,bionic-gcc_8,focal,jammy,lunar,mantic} \
+                     ubuntu-{xenial-toolchain-gcc_9,bionic-gcc_8,focal,jammy,lunar,mantic,noble} \
                      debian-{buster-gcc_spkg,bullseye,bookworm,trixie,sid} \
-                     linuxmint-{20.1,20.2,20.3,21,21.1,21.2} \
-                     fedora-{30,31,32,33,34,35,36,37,38,39} \
+                     linuxmint-{20.1,20.2,20.3,21,21.1,21.2,21.3} \
+                     fedora-{30,31,32,33,34,35,36,37,38,39,40} \
                      centos-7-devtoolset-gcc_11 \
                      centos-stream-{8,9}-python3.9 \
                      almalinux-{8-python3.9,9-python3.11} \
-                     gentoo-python{3.10,3.11} \
+                     gentoo-python{3.10,3.11,3.12} \
                      archlinux-latest \
-                     opensuse-{15.3-gcc_11-python3.9,15.4-gcc_11-python3.10,15.5-gcc_11-python3.11} \
+                     opensuse-15.5-gcc_11-python3.11 \
                      opensuse-tumbleweed{-python3.10,} \
                      conda-forge-python3.11 \
                      ubuntu-bionic-gcc_8-i386 \