A032468 Numbers k such that 183*2^k+1 is prime.

1, 2, 5, 10, 21, 34, 61, 72, 157, 169, 193, 216, 389, 464, 596, 657, 794, 1289, 1616, 1736, 1994, 2344, 3024, 4084, 4420, 5840, 6481, 12010, 12521, 12920, 13762, 15652, 17480, 17800, 22514, 25193, 40989, 55565, 57440, 88409, 92146, 123964, 150485, 163953

Offset

1,2

Links

Jeppe Stig Nielsen, Table of n, a(n) for n = 1..63 (terms n = 1..60 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

Maple

select(k->isprime(183*2^k+1), [$0..1000]); # Muniru A Asiru, Dec 18 2018

Mathematica

Select[Range[1000], PrimeQ[183*2^# + 1] & ] (* Robert Price, Dec 18 2018 *)

Prog

(PARI) is(n)=ispseudoprime(183*2^n+1) \\ Charles R Greathouse IV, Jun 13 2017

Crossrefs

Sequence in context: A124146 A262408 A344378 * A327286 A215925 A359209

Adjacent sequences: A032465 A032466 A032467 * A032469 A032470 A032471

Keyword

nonn,hard

Author

N. J. A. Sloane.

Extensions

a(41)-a(60) from the Ray Ballinger and Wilfrid Keller link by Robert Price, Dec 18 2018

Status

approved