A244546 Wieferich primes p to base p-th prime.

997, 1879, 2617, 85091

Offset: 1

Author

Felix Fröhlich, Jun 29 2014

Keywords

• nonn
• hard
• more

Comments

No further terms up to 10^6.

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

Examples

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

Crossrefs

Cf. A001220, A174422, A178900, A196202.

Programs

PARI

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