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Forum: Homework Help 2021-10-29, 13:47
Replies: 15
Views: 2,150
Posted By Dr Sardonicus
Correct me if I'm wrong, but AFAIK a C long...

Correct me if I'm wrong, but AFAIK a C long multiply will cause an integer overflow if the product is greater than 231 - 1. So if s > 215.5 then s*s will overflow. Since 17 > 15.5 I found your...
Forum: Homework Help 2021-10-28, 13:25
Replies: 15
Views: 2,150
Posted By Dr Sardonicus
I'm not a programmer, but it looks to me like...

I'm not a programmer, but it looks to me like you're looking at 2p - 1 for odd primes p < 20.

I note that there is one even prime number. It may yield a Mersenne prime. :wink:

I don't know...
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