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A032377
Numbers k such that 55*2^k+1 is prime.
0
4, 8, 16, 22, 32, 94, 220, 244, 262, 286, 344, 356, 392, 1996, 2744, 5158, 6964, 13484, 15164, 197350, 300632, 309560, 363892, 673708, 1177924, 1308148, 1669798
OFFSET
1,1
PROG
(PARI) is(n)=ispseudoprime(55*2^n+1) \\ Charles R Greathouse IV, Jun 13 2017
CROSSREFS
Sequence in context: A340298 A053688 A036302 * A358435 A312823 A133690
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