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A032370 Numbers k such that 41*2^k+1 is prime. 0
1, 11, 19, 215, 289, 379, 1991, 7607, 8411, 12493, 13235, 13823, 274897, 364861, 462023, 1530313, 5651731 (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(41*2^n+1) \\ Charles R Greathouse IV, Jun 13 2017
CROSSREFS
Sequence in context: A048389 A163151 A020457 * A295834 A129908 A344431
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(17) from Jeppe Stig Nielsen, Feb 16 2020
STATUS
approved

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Last modified March 28 18:04 EDT 2024. Contains 371254 sequences. (Running on oeis4.)