A032371 Numbers k such that 43*2^k+1 is prime.

2, 6, 12, 18, 26, 32, 94, 98, 104, 144, 158, 252, 778, 1076, 2974, 3022, 3528, 4344, 5322, 10416, 10422, 29862, 33526, 163354, 167618, 175542, 217584, 762212, 835934, 894766, 1087992, 1235298, 1795628, 1799016, 2795582, 2994958, 3063674

Offset

1,1

Links

Table of n, a(n) for n=1..37.

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

Ray Ballinger, Proth Search Page

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(43*2^n+1) \\ Charles R Greathouse IV, Jun 12 2017

Crossrefs

Sequence in context: A348774 A265843 A276829 * A162802 A330320 A267461

Adjacent sequences: A032368 A032369 A032370 * A032372 A032373 A032374

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

a(35)-a(37) from Jeppe Stig Nielsen, Jan 18 2020

Status

approved