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A050594
Numbers n such that 137*2^n-1 is prime.
0
2, 18, 38, 62, 2180, 2900, 3132, 3462, 3578, 5724, 5810, 18468, 30044, 36122, 37610, 43782, 310790, 1849238
OFFSET
1,1
PROG
(PARI) is(n)=ispseudoprime(137*2^n-1) \\ Charles R Greathouse IV, Jun 13 2017
CROSSREFS
Sequence in context: A085876 A099904 A137308 * A098857 A189333 A072278
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