fyi below r my article n code as of 2021.
• https://github.com/yuukiarchives/yuukiarchives.github.io/blob/f4c6c14d50a348efd8e41c8a7c9f85ac2099b57c/_drafts/2021-12-09-primes.md
• https://github.com/yuukiarchives/prime/tree/70adc8726fa1fb25e3f34f9a8f98ea722883ede4

smtg like
% g++ -std=c++11 primes-below-10m.cc prime.cc
can compile them.

revi(v|s)ing an article on prime number programs i had written in 2021.
https://github.com/yuukiarchives/yuukiarchives.github.io/blob/main/_drafts/2021-12-09-c-prime-number-programs.md

all the code will now go below.
https://github.com/yuukiarchives/prime