A244546 Wieferich primes p to base p-th prime.

997, 1879, 2617, 85091

Offset

1,1

Comments

No further terms up to 10^6.

No further terms up to 10^11. - Luke March, Jul 16 2014

Links

Table of n, a(n) for n=1..4.

Example

a(1) = 997, since prime(997) = 7883 and 7883^996 % 997^2 = 1.

Prog

(PARI) forprime(p=2, 10^6, q=prime(p); if(Mod(q, p^2)^(p-1)==1, print1(p, ", ")))

Crossrefs

Cf. A001220, A174422, A178900, A196202.

Sequence in context: A106763 A247122 A091362 * A091365 A235165 A259505

Adjacent sequences: A244543 A244544 A244545 * A244547 A244548 A244549

Keyword

nonn,hard,more

Author

Felix Fröhlich, Jun 29 2014

Status

approved