A032382 Numbers k such that 65*2^k+1 is prime.

1, 3, 5, 11, 17, 21, 29, 47, 85, 93, 129, 151, 205, 239, 257, 271, 307, 351, 397, 479, 553, 1317, 1631, 1737, 1859, 1917, 1999, 2353, 3477, 4331, 4337, 5809, 8707, 9649, 10421, 11117, 17425, 18343, 20791, 21035, 28331, 34249, 45029, 73237, 84839, 106515

Offset

1,2

Links

Jeppe Stig Nielsen, Table of n, a(n) for n = 1..68

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(65*2^n+1) \\ Charles R Greathouse IV, Jun 13 2017

Crossrefs

Sequence in context: A220954 A155937 A050566 * A167921 A216366 A136084

Adjacent sequences: A032379 A032380 A032381 * A032383 A032384 A032385

Keyword

nonn

Author

James R. Buddenhagen

Extensions

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

a(66) from http://www.prothsearch.com/riesel1.html by Robert Price, Dec 14 2018

Terms moved from Data section to b-file, and more terms appended to b-file, by Jeppe Stig Nielsen, Jan 18 2020

Status

approved