A032384 Numbers k such that 69*2^k+1 is prime.

1, 2, 10, 14, 19, 26, 50, 55, 145, 515, 842, 1450, 2159, 2290, 2306, 2335, 3379, 4025, 4825, 7850, 9194, 10409, 18743, 20993, 34433, 40691, 69119, 172349, 211226, 353818, 367583, 394574, 503641, 617993, 631121, 724802, 1206353, 1316758, 1595083, 1628378, 1816739

Offset

1,2

Links

Table of n, a(n) for n=1..41.

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(69*2^n+1) \\ Charles R Greathouse IV, Jun 13 2017

Crossrefs

Sequence in context: A345017 A349832 A050546 * A032624 A350059 A349833

Adjacent sequences: A032381 A032382 A032383 * A032385 A032386 A032387

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