Comment by maccard

I'm running an i7-6700k, on Windows 10 with the MSVC 2015 compiler, my results were 9592 primes between 0 and 100000 Time taken = 12.808 Without optimisations, and 9592 primes between 0 and 100000 Time taken = 10.853 with full optimisations. I would ahve thought it would have been much better. without and with optimisations.