1,2

Table of n, a(n) for n=1..33.

Ray Ballinger, Proth Search Page

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

Sequence in context: A187573 A057653 A085759 * A125018 A074787 A255645

Adjacent sequences: A032490 A032491 A032492 * A032494 A032495 A032496

nonn,hard

N. J. A. Sloane.

approved