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 Showing results 1 to 5 of 5 Search took 0.01 seconds. Search: Posts Made By: sweety439
 Forum: Wagstaff PRP Search 2019-06-26, 19:45 Replies: 28 Views: 11,763 Posted By sweety439 The common generalization is Phi(Phi(n,2),2) and... The common generalization is Phi(Phi(n,2),2) and Phi(2*Phi(n,2),2), with any integer n However, there are no known n such that Phi(n,2) is composite but Phi(Phi(n,2),2) is prime, also no known n...
 Forum: Wagstaff PRP Search 2019-06-26, 17:41 Replies: 28 Views: 11,763 Posted By sweety439 status of the Wagstaff numbers with these... status of the Wagstaff numbers with these exponents: n Phi_n(2) known factors of (2^Phi_n(2)+1)/3 1 1 = unit 2 3 prime 3 7 prime 4 5 prime 5 31 ...
 Forum: Wagstaff PRP Search 2019-06-26, 06:36 Replies: 28 Views: 11,763 Posted By sweety439 I saw this thread and I have a generalization for... I saw this thread and I have a generalization for the double Mersenne numbers, Wagstaff-Mersenne numbers, Mersenne-Wagstaff numbers, double Wagstaff numbers, Mersenne-Fermat numbers and...
 Forum: Wagstaff PRP Search 2019-06-25, 20:17 Replies: 28 Views: 11,763 Posted By sweety439 I know that if M(M(p)) is prime, then M(p) must... I know that if M(M(p)) is prime, then M(p) must be itself prime, similarly, if W(W(p)) is prime, then W(p) must be itself prime.
 Forum: Wagstaff PRP Search 2019-06-25, 20:13 Replies: 28 Views: 11,763 Posted By sweety439 Double Wagstaff prime? If M(p) = 2^p-1, then M(M(p)) is called double Mersenne number, and if this number is prime, then it is called double Mersenne prime, M(M(p)) is prime for p = 2, 3, 5 and 7, but not for all...
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