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Search: Posts Made By: sweety439
Forum: Wagstaff PRP Search 2019-11-23, 22:39
Replies: 6
Views: 3,806
Posted By sweety439
341 divides M170 and 341=2*170+1, but 341 is not...

341 divides M170 and 341=2*170+1, but 341 is not prime :cmd::cmd::cmd:
Forum: Wagstaff PRP Search 2019-11-23, 21:46
Replies: 6
Views: 3,806
Posted By sweety439
if p is prime, q=2*p+1 is also prime, then: ...

if p is prime, q=2*p+1 is also prime, then:

q divides Mp if and only if p = 3 mod 4

q divides Wp if and only if p = 1 mod 4
Forum: Wagstaff PRP Search 2019-11-23, 21:45
Replies: 6
Views: 3,806
Posted By sweety439
p divides Mn if and only if ordp(2) divides n,...

p divides Mn if and only if ordp(2) divides n, and p divides Wn (for odd n) if and only if ordp(2) is even and divides 2n

This is the list for ordp(2) for small odd primes:


3,2
5,4
...
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