A155838 Primes p such that p^2 divides A085606(2p-2) = (2p-3)^(2p-2) - 1.

2, 5, 13, 61681, 1235573, 27544452149

Offset: 1

Author

Alexander Adamchuk, Jan 28 2009

Keywords

• hard
• more
• nonn

Comments

For p>3, (2p-3)^(2p-2) - 1 is divisible by p.

Primes p such that 3^p == 3-2p (mod p^2).

No other terms below 10^11.

Crossrefs

Cf. A085606.

Extensions

27544452149 from Max Alekseyev, Oct 14 2009