A154998 Primes p such that p^2 divides A048861((p-1)/2).

3, 2001907169

Offset

1,1

Comments

No other terms below 10^11.

Links

Table of n, a(n) for n=1..2.

Formula

Elements of A125854 congruent to 1 or 3 modulo 8, i.e., primes p such that p == 1 or 3 (mod 8) and 2^(p-1) == 1+p (mod p^2).

Prog

(PARI) { forprime(p=3, 10^11, if(Mod((p-1)/2, p^2)^((p-1)/2)==1, print(p); )) }

Crossrefs

A048861,A121999,A125854

Sequence in context: A368722 A067481 A058433 * A036236 A235357 A260002

Adjacent sequences: A154995 A154996 A154997 * A154999 A155000 A155001

Keyword

bref,hard,more,nonn

Author

Max Alekseyev, Jan 18 2009

Extensions

Edited by Max Alekseyev, Oct 13 2009

Status

approved