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A032391
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Numbers k such that 83*2^k+1 is prime.
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0
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1, 5, 157, 181, 233, 373, 2425, 2773, 3253, 4129, 10105, 12577, 14981, 16069, 27425, 31201, 31957, 32749, 45473, 59401, 156413, 445205, 1154617
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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..23.
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(83*2^n+1) \\ Charles R Greathouse IV, Jun 13 2017
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CROSSREFS
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Sequence in context: A015019 A225165 A151577 * A139978 A304147 A305487
Adjacent sequences: A032388 A032389 A032390 * A032392 A032393 A032394
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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 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
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STATUS
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approved
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