A032377 Numbers k such that 55*2^k+1 is prime.

4, 8, 16, 22, 32, 94, 220, 244, 262, 286, 344, 356, 392, 1996, 2744, 5158, 6964, 13484, 15164, 197350, 300632, 309560, 363892, 673708, 1177924, 1308148, 1669798

Offset

1,1

Links

Table of n, a(n) for n=1..27.

Ray Ballinger, Proth Search Page

Ray Ballinger and Wilfrid Keller, List of primes k.2^n + 1 for k < 300

Y. Gallot, Proth.exe: Windows Program for Finding Large Primes

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

Prog

(PARI) is(n)=ispseudoprime(55*2^n+1) \\ Charles R Greathouse IV, Jun 13 2017

Crossrefs

Sequence in context: A340298 A053688 A036302 * A358435 A312823 A133690

Adjacent sequences: A032374 A032375 A032376 * A032378 A032379 A032380

Keyword

nonn

Author

James R. Buddenhagen

Extensions

More terms from Hugo Pfoertner, Jun 20 2003

More terms (from http://web.archive.org/web/20161028080239/http://www.prothsearch.net/riesel.html), Joerg Arndt, Apr 07 2013

Status

approved