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A050577
Numbers n such that 103*2^n-1 is prime.
0
3, 7, 11, 19, 63, 75, 95, 127, 155, 163, 171, 283, 563, 1739, 2243, 3971, 4375, 5227, 8307, 9943, 18383, 19835, 25879, 26927, 36895, 304771, 422939
OFFSET
1,1
PROG
(PARI) is(n)=ispseudoprime(103*2^n-1) \\ Charles R Greathouse IV, Jun 13 2017
CROSSREFS
Sequence in context: A284027 A111056 A083908 * A283178 A284298 A178881
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