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A032370
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Numbers k such that 41*2^k+1 is prime.
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0
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1, 11, 19, 215, 289, 379, 1991, 7607, 8411, 12493, 13235, 13823, 274897, 364861, 462023, 1530313, 5651731
(list;
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refs;
listen;
history;
text;
internal format)
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OFFSET
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1,2
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LINKS
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Table of n, a(n) for n=1..17.
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
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PROG
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(PARI) is(n)=ispseudoprime(41*2^n+1) \\ Charles R Greathouse IV, Jun 13 2017
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CROSSREFS
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Sequence in context: A048389 A163151 A020457 * A295834 A129908 A129909
Adjacent sequences: A032367 A032368 A032369 * A032371 A032372 A032373
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KEYWORD
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nonn
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AUTHOR
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James R. Buddenhagen
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EXTENSIONS
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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
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STATUS
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approved
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