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Forum: Number Theory Discussion Group 2022-02-08, 14:43
Replies: 2
Views: 722
Posted By JCoveiro
also2

Numbers:
3,11,23,191,3539,10691,83339,4031399,13347311
can be generated by: isprime(2*p+1)&&(p%4==3)

And numbers:
5,89,9689,21701,859433,43112609
can be generated by: isprime(2*p+1)&&(p%4==1)
Forum: Number Theory Discussion Group 2022-02-08, 14:13
Replies: 2
Views: 722
Posted By JCoveiro
also

Also:

If (2*p+1) | Mersenne(p) then: Wagstaff(p) might be a prime.

3,11,23,191,3539,10691,83339,4031399,13347311

and

If (2*p+1) | Wagstaff(p) then: Mersenne(p) might be a prime.
Forum: Number Theory Discussion Group 2022-02-06, 19:22
Replies: 2
Views: 722
Posted By JCoveiro
Sophie Germain Primes, Mersenne numbers and Wagstaff numbers Connection

Hi all.

I think I've found a "Sophie Germain Primes" connection with Mersenne numbers and Wagstaff numbers.

k=1;forprime(x=1,1000,if(isprime(2*x+1),print1("SophieGermain("k")*2+1 = ("x"*2+1) =...
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