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Forum: Wagstaff PRP Search 2019-11-18, 02:49
Replies: 28
Views: 11,763
Posted By axn
I did a search of all k < 10^6. Here are the...

I did a search of all k < 10^6. Here are the primes. No factors, natch.
2*55675*((2^42737+1)/3)+1
2*73311*((2^42737+1)/3)+1
2*107851*((2^42737+1)/3)+1
2*136444*((2^42737+1)/3)+1...
Forum: Wagstaff PRP Search 2019-11-15, 06:11
Replies: 28
Views: 11,763
Posted By axn
Wagstaff factors must be 1 or 3 (mod 8). Your...

Wagstaff factors must be 1 or 3 (mod 8). Your numbers are 7 (mod 8). So they can't divide.

But if you want to test them, you can use Pari/GP

? W=(2^42737+1)/3;
? N=2*21085*((2^42737+1)/3)+1;...
Forum: Wagstaff PRP Search 2019-06-26, 02:40
Replies: 28
Views: 11,763
Posted By axn
3290547117383710719111443 | W(W(61))

3290547117383710719111443 | W(W(61))
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