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A032374 Numbers k such that 49*2^k+1 is prime. 1
2, 6, 10, 30, 42, 54, 66, 118, 390, 594, 1202, 2334, 6242, 7446, 11858, 48666, 68050, 72210, 88090, 113022, 406814, 501238, 1103430, 1646042, 3837090 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
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(49*2^n+1) \\ Charles R Greathouse IV, Jun 12 2017
CROSSREFS
Sequence in context: A102581 A152000 A038042 * A342401 A074095 A079855
KEYWORD
nonn
AUTHOR
EXTENSIONS
More terms (from http://web.archive.org/web/20161028080239/http://www.prothsearch.net/riesel.html), Joerg Arndt, Apr 07 2013
a(25) from Jeppe Stig Nielsen, Sep 22 2019
STATUS
approved

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Last modified March 19 01:57 EDT 2024. Contains 370952 sequences. (Running on oeis4.)