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A050903
Numbers n such that 289*2^n-1 is prime.
0
1, 3, 13, 21, 25, 33, 73, 93, 115, 127, 397, 1255, 3751, 3801, 4771, 8997, 10063, 11253, 18663, 27525, 28009, 34041, 55693, 60243, 67891, 77391, 90201, 501991, 509401
OFFSET
1,2
COMMENTS
Also in the sequence: 610737, 728205, 1098117 - Herman Jamke (hermanjamke(AT)fastmail.fm), Jan 02 2008
PROG
(PARI) is(n)=ispseudoprime(289*2^n-1) \\ Charles R Greathouse IV, Jun 13 2017
CROSSREFS
Sequence in context: A099502 A145024 A055059 * A117766 A243162 A147351
KEYWORD
hard,nonn
AUTHOR
N. J. A. Sloane, Dec 29 1999
EXTENSIONS
More terms from Herman Jamke (hermanjamke(AT)fastmail.fm), Jan 02 2008
STATUS
approved