A032393 Numbers k such that 87*2^k+1 is prime.

2, 6, 8, 18, 26, 56, 78, 86, 104, 134, 207, 518, 602, 1268, 1302, 2324, 2372, 4574, 5652, 5966, 6146, 6378, 7502, 7682, 7895, 9198, 9344, 11106, 11504, 12096, 19904, 19932, 20816, 43406, 57222, 61202, 83766, 98978, 121562, 177078, 187454, 315486, 370746

Offset

1,1

Links

Jeppe Stig Nielsen, Table of n, a(n) for n = 1..52

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(87*2^n+1) \\ Charles R Greathouse IV, Jun 13 2017

Crossrefs

Sequence in context: A152598 A154610 A053658 * A102656 A163911 A301799

Adjacent sequences: A032390 A032391 A032392 * A032394 A032395 A032396

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

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

Status

approved