

A032359


Numbers k such that 19*2^k+1 is prime.


2



6, 10, 46, 366, 1246, 2038, 4386, 4438, 6838, 7498, 7998, 9450, 11890, 17034, 23290, 73338, 149146, 323638, 853546, 2206266
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OFFSET

1,1


LINKS

Table of n, a(n) for n=1..20.
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^n1 (or k*2^n+1) is prime


PROG

(PARI) is(n)=ispseudoprime(19*2^n+1) \\ Charles R Greathouse IV, Jun 06 2017


CROSSREFS

Sequence in context: A153328 A068588 A083333 * A115917 A275004 A115741
Adjacent sequences: A032356 A032357 A032358 * A032360 A032361 A032362


KEYWORD

nonn,hard


AUTHOR

James R. Buddenhagen


EXTENSIONS

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


STATUS

approved



