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A032391
Numbers k such that 83*2^k+1 is prime.
0
1, 5, 157, 181, 233, 373, 2425, 2773, 3253, 4129, 10105, 12577, 14981, 16069, 27425, 31201, 31957, 32749, 45473, 59401, 156413, 445205, 1154617
OFFSET
1,2
PROG
(PARI) is(n)=ispseudoprime(83*2^n+1) \\ Charles R Greathouse IV, Jun 13 2017
CROSSREFS
Sequence in context: A015019 A225165 A151577 * A139978 A304147 A305487
KEYWORD
nonn
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