diff --git a/intro-HPC/examples/Program-examples/01_Python/file3.py b/intro-HPC/examples/Program-examples/01_Python/file3.py
index e56ecaafd99..c07ae5355aa 100755
--- a/intro-HPC/examples/Program-examples/01_Python/file3.py
+++ b/intro-HPC/examples/Program-examples/01_Python/file3.py
@@ -13,8 +13,8 @@
 #
 def primes(top):
 	result = []
-	for n in range(2, top):
-		for x in range(2, n/2+1):
+	for n in range(2, top+1):
+		for x in range(2, n):
 			if n % x == 0:
 				break
 		else:
@@ -33,11 +33,11 @@ def primes(top):
 #
 scratch_dir = os.environ.get('VSC_SCRATCH')
 filename_p1 = scratch_dir + "/primes_1.txt"
-print "Output File: ", filename_p1
+print("Output File: ", filename_p1)
 f_out = open(filename_p1, 'w+')
 for i in range(1, 30000):
 	# We take a random integer between 1 and 2000
-	top = random.randrange(2000)
+	top = random.randrange(2,2000)
 	# and we calculate all primes up to that limit
 	l = primes(top)
 	f_out.write('TOP=')
@@ -60,8 +60,8 @@ def primes(top):
 filename_p2 = scratch_dir + "/primes_2.txt"
 f_in=open(filename_p1, "r")  
 f_out=open(filename_p2, "w")  
-print "Input File: ", filename_p1
-print "Output File: ", filename_p2
+print("Input File: ", filename_p1)
+print("Output File: ", filename_p2)
 in_lines=f_in.readlines()          					  #reads it line by line
 for line in in_lines:
 	delim = line.find("[")
@@ -82,5 +82,5 @@ def primes(top):
 
 end_time = int(time.time())
 duration = end_time - start_time
-print "Duration = " + str(duration) + " seconds."
+print("Duration = " + str(duration) + " seconds.")
 
diff --git a/intro-HPC/examples/Program-examples/01_Python/primes.py b/intro-HPC/examples/Program-examples/01_Python/primes.py
index 37e85302ad7..20b93fbf3c5 100755
--- a/intro-HPC/examples/Program-examples/01_Python/primes.py
+++ b/intro-HPC/examples/Program-examples/01_Python/primes.py
@@ -18,7 +18,7 @@ def ask_int(prompt, retries=3):
 		if num > 1:
 			return num
 		else:
-			print "Please enter an integer which is bigger as one."
+			print('Please enter an integer which is bigger as one.')
 			retries = retries - 1
 		if retries <= 0:
 			print('Too many attempts, try again later.')
@@ -27,23 +27,23 @@ def ask_int(prompt, retries=3):
 #
 # PRIMES
 #
-print "This program calculates all primes between 1 and your upper limit."
+print('This program calculates all primes between 1 and your upper limit.')
 num = ask_int('Enter your upper limit (>1): ')
 start_time = print_time("Start Time: ")
-print "[Prime#1] = 1"
+print('[Prime#1] = 1')
 ctr = 1
-for n in range(2, int(num)):
-	for x in range(2, n/2+1):
+for n in range(2, int(num)+1):
+	for x in range(2, n):
 		if n % x == 0:
 			break
 	else:
 		# loop fell through without finding a factor
 		ctr += 1
-		print "[Prime#%i] = %i" % (ctr,n)
+		print('[Prime#%i] = %i' % (ctr,n))
 end_time = print_time("End Time: ")
 duration = end_time - start_time
 s = "Duration:  " + str(duration) + " seconds."
-print s
+print(s)