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A032359 Numbers n such that 19*2^n+1 is prime. 1
6, 10, 46, 366, 1246, 2038, 4386, 4438, 6838, 7498, 7998, 9450, 11890, 17034, 23290, 73338, 149146, 323638, 853546, 2206266 (list; graph; refs; listen; history; text; internal format)
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^n-1 (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

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Last modified September 23 13:55 EDT 2017. Contains 292358 sequences.