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A050881
Numbers n such that 245*2^n-1 is prime.
0
4, 6, 28, 76, 96, 124, 294, 396, 726, 868, 928, 1400, 3056, 6594, 12588, 15708, 88576, 144288, 238468
OFFSET
1,1
COMMENTS
Also in the sequence: 606706, 619938 - Herman Jamke (hermanjamke(AT)fastmail.fm), Jan 02 2008
PROG
(PARI) is(n)=ispseudoprime(245*2^n-1) \\ Charles R Greathouse IV, Jun 13 2017
CROSSREFS
Sequence in context: A066293 A204385 A341045 * A229719 A122113 A093815
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