By compiling and running this really simple C++ code, you will realize how many time some quintillion comparisons could take running in the hosted CPU.
It's simple to understant wahts is going on: just read the code and follow the math.
Then, imagine this in 2 months using a good GPU. Yes, it's possible!
If you don't feel confortable enough to run this code on your computer, run on: https://onlinegdb.com/hKIp36KtP.