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.

No further terms <= 22307 = prime(2500). - Michael S. Branicky, Sep 25 2024

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

Cf. A000040.

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