1,2

Computed by Joe K. Crump (joecr(AT)carolina.rr.com) and (mostly) by David Broadhurst (D.Broadhurst(AT)open.ac.uk).

Ray Ballinger and Wilfrid Keller, List of primes k.2^n + 1 for k < 300

Wilfrid Keller, List of primes k.2^n - 1 for k < 300

Index entries for sequences of n such that k*2^n-1 (or k*2^n+1) is prime

Cf. A050412, A050544.

Sequence in context: A135924 A035876 A072435 this_sequence A050544 A125492 A068265

Adjacent sequences: A050410 A050411 A050412 this_sequence A050414 A050415 A050416

nonn,hard

David Broadhurst (D.Broadhurst(AT)open.ac.uk), Dec 22 1999

David Broadhurst (D.Broadhurst(AT)open.ac.uk), Dec 26 1999 reports that primality up to n=51476 is now proved, using Yves Gallot's proth.exe.