A032364 Numbers k such that 29*2^k+1 is prime.

1, 3, 5, 11, 27, 43, 57, 75, 77, 93, 103, 143, 185, 231, 245, 391, 1053, 1175, 2027, 3627, 4727, 5443, 7927, 8533, 9067, 14185, 25723, 88117, 96947, 144937, 219317, 252227, 261031, 339123, 343601, 627167, 742191, 800191, 1152765, 1416873, 1574753, 3964697

Offset

1,2

Links

Jeppe Stig Nielsen, Table of n, a(n) for n = 1..43

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

Ray Ballinger, Proth Search Page

Chris Caldwell, The Prime Pages, Database Search Output for 29*2^?+1.

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(29*2^n+1) \\ Charles R Greathouse IV, Jun 12 2017

Crossrefs

Sequence in context: A320177 A289468 A289534 * A288828 A088357 A369344

Adjacent sequences: A032361 A032362 A032363 * A032365 A032366 A032367

Keyword

nonn,hard

Author

James R. Buddenhagen

Extensions

More terms from Hugo Pfoertner, Jun 20 2003

Added more terms (from http://web.archive.org/web/20161028080239/http://www.prothsearch.net/riesel.html), Joerg Arndt, Apr 07 2013

a(42) from Jeppe Stig Nielsen, Sep 29 2019

Status

approved