login
A050847
Numbers n such that 191*2^n-1 is prime.
0
226, 3594, 59770, 240802
OFFSET
1,1
PROG
(PARI) is(n)=ispseudoprime(191*2^n-1) \\ Charles R Greathouse IV, Jun 13 2017
CROSSREFS
Sequence in context: A251395 A251507 A251500 * A098247 A092994 A031513
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