A216668 Smallest integer b > 1 such that for all primes p <= prime(n), (b+1)^p - b^p is prime if and only if 2^p-1 is prime.

2, 2, 2, 296, 296, 369719, 457578, 43410300320, 43410300320, 43410300320, 288975248496

Offset: 1

Author

Jean-Louis Charton, Sep 13 2012

Keywords

• nonn
• hard
• more

Crossrefs

Cf. A216666.

Extensions

a(11) from Jean-Louis Charton, Oct 03 2012