A137999 Primes p such that (p^p-p!)/p is prime.

3, 5, 7, 71, 151, 157

Offset

1,1

Comments

In spite of the given PARI code, it has been checked that the given terms are indeed primes, not just probable primes.

Links

Table of n, a(n) for n=1..6.

Prog

(PARI) forprime( p=1, 9999, ispseudoprime(p^(p-1)-(p-1)!) & print1(p", "))

Crossrefs

Sequence in context: A117646 A064857 A065913 * A353141 A291438 A056145

Adjacent sequences: A137996 A137997 A137998 * A138000 A138001 A138002

Keyword

hard,more,nonn

Author

M. F. Hasler, Mar 18 2008

Extensions

Edited by T. D. Noe, Oct 30 2008

Status

approved