1,1

Jeppe Stig Nielsen, Table of n, a(n) for n = 1..46

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[223*2^# + 1] & ] (* Robert Price, Dec 19 2018 *)

(PARI) is(n)=ispseudoprime(223*2^n+1) \\ Charles R Greathouse IV, Jun 13 2017

Sequence in context: A302429 A292999 A216047 * A102844 A303199 A097543

Adjacent sequences: A032485 A032486 A032487 * A032489 A032490 A032491

nonn,hard

N. J. A. Sloane.

a(36)-a(43) from the Ray Ballinger and Wilfrid Keller link by Robert Price, Dec 19 2018

approved