A032383 - OEIS

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A032383

Numbers k such that 67*2^k+1 is prime.

1

2, 6, 14, 20, 44, 66, 74, 102, 134, 214, 236, 238, 342, 354, 382, 454, 470, 598, 726, 870, 1148, 1366, 1692, 1782, 1870, 3602, 6574, 9362, 12366, 20774, 24500, 29266, 32650, 51942, 101742, 103572, 305166, 339116, 466532, 469596, 576558, 684258, 752396, 773566

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

Jeppe Stig Nielsen, Table of n, a(n) for n = 1..49

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(67*2^n+1) \\ Charles R Greathouse IV, Jun 13 2017

CROSSREFS

Sequence in context: A151731 A009779 A086666 * A014775 A009218 A071122

Adjacent sequences: A032380 A032381 A032382 * A032384 A032385 A032386

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

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

STATUS

approved