1,1

Table of n, a(n) for n=1..19.

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

(PARI) is(n)=ispseudoprime(197*2^n+1) \\ Charles R Greathouse IV, Jun 13 2017

Sequence in context: A164564 A211329 A104298 * A169728 A167054 A241680

Adjacent sequences: A032472 A032473 A032474 * A032476 A032477 A032478

nonn,hard

N. J. A. Sloane.

approved