A032391 Numbers k such that 83*2^k+1 is prime.

1, 5, 157, 181, 233, 373, 2425, 2773, 3253, 4129, 10105, 12577, 14981, 16069, 27425, 31201, 31957, 32749, 45473, 59401, 156413, 445205, 1154617

Offset

1,2

Links

Table of n, a(n) for n=1..23.

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(83*2^n+1) \\ Charles R Greathouse IV, Jun 13 2017

Crossrefs

Sequence in context: A015019 A225165 A151577 * A139978 A304147 A305487

Adjacent sequences: A032388 A032389 A032390 * A032392 A032393 A032394

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