A032392 Numbers k such that 85*2^k+1 is prime.

4, 6, 10, 30, 34, 36, 38, 74, 88, 94, 148, 200, 624, 1300, 2458, 2556, 3638, 3834, 8956, 15058, 15818, 25954, 187576, 382836, 466658, 818760, 876458, 892568, 1072368, 1910520

Offset

1,1

Links

Table of n, a(n) for n=1..30.

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(85*2^n+1) \\ Charles R Greathouse IV, Jun 13 2017

Crossrefs

Sequence in context: A322961 A291542 A242565 * A253048 A271956 A242502

Adjacent sequences: A032389 A032390 A032391 * A032393 A032394 A032395

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

Status

approved