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A032376 Numbers k such that 53*2^k+1 is prime. 0
1, 5, 17, 21, 61, 85, 93, 105, 133, 485, 857, 1665, 2133, 2765, 5621, 9025, 12241, 165541, 181033, 205301, 341301, 482377, 816013, 1066381, 1541133 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
Ray Ballinger, Proth Search Page
Ray Ballinger and Wilfrid Keller, List of primes k.2^n + 1 for k < 300
PROG
(PARI) is(n)=ispseudoprime(53*2^n+1) \\ Charles R Greathouse IV, Jun 13 2017
CROSSREFS
Sequence in context: A262620 A191210 A191143 * A145818 A029986 A076275
KEYWORD
nonn
AUTHOR
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

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Last modified March 18 22:56 EDT 2024. Contains 370952 sequences. (Running on oeis4.)