1,2

Jeppe Stig Nielsen, Table of n, a(n) for n = 1..76 (terms n = 1..72 from Robert Price)

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

Select[Range[1000], PrimeQ[231*2^# + 1] & ] (* Robert Price, Dec 19 2018 *)

(PARI) is(n)=ispseudoprime(231*2^n+1) \\ Charles R Greathouse IV, Jun 13 2017

Sequence in context: A191771 A267027 A267865 * A223134 A339690 A267087

Adjacent sequences: A032489 A032490 A032491 * A032493 A032494 A032495

nonn,hard

N. J. A. Sloane.

a(51)-a(72) from the Ray Ballinger and Wilfrid Keller link by Robert Price, Dec 19 2018

approved