Well the purpose of the exercise kind of *is* to write a prime
number generator. You can look up prime number sieves and
algorithms. For REALLY large numbers, that takes an insane
amount of time, and you can instead use algorithms such as the
ones outlined at
https://csrc.nist.gov/csrc/media/publications/fips/186/3/archive/2009-06-25/documents/fips_186-3.pdf (appendix C.3)
- Is prime missing in photos? Andre Pany via Digitalmars-d-learn
- Re: Is prime missing in photos? Elronnd via Digitalmars-d-learn