A216666 Smallest integer b such that (b+1)^p - b^p is prime for all primes p <= prime(n).

1, 1, 1, 1, 6524, 809652228, 30717523794, 55779743835

Offset: 1

Author

Jean-Louis Charton, Sep 13 2012

Keywords

• nonn
• hard
• more

Comments

Is this sequence infinite?

a(9) > 10^11. - Tyler Busby, Feb 20 2023

Examples

			a(1)=a(2)=a(3)=a(4)=1 since 2^2-1, 2^3-1, 2^5-1 and 2^7-1 are primes.
		

Crossrefs

Cf. A216668.

Extensions

a(7) from Jean-Louis Charton, Sep 18 2012

a(8) from Jean-Louis Charton, Oct 02 2012