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A050616
Numbers k such that 149*2^k-1 is prime.
0
4, 16, 48, 60, 240, 256, 304, 2644, 3720, 25132, 39472, 212460, 592968
OFFSET
1,1
COMMENTS
All terms appear to be multiples of four. - Robert Price, Dec 23 2018
MATHEMATICA
Select[Range[1000], PrimeQ[149*2^# - 1] & ] (* Robert Price, Dec 23 2018 *)
PROG
(PARI) is(n)=ispseudoprime(149*2^n-1) \\ Charles R Greathouse IV, Jun 13 2017
CROSSREFS
Sequence in context: A244252 A369401 A308592 * A297160 A006009 A261977
KEYWORD
hard,nonn,more
AUTHOR
N. J. A. Sloane, Dec 29 1999
EXTENSIONS
More terms from Herman Jamke (hermanjamke(AT)fastmail.fm), Jan 02 2008
STATUS
approved