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A050888
Numbers n such that 259*2^n-1 is prime.
0
5, 7, 9, 27, 33, 37, 59, 179, 289, 389, 917, 1885, 2987, 3683, 4807, 8709, 10153, 11067, 11665, 18909, 22085, 32489, 36233, 143133, 202609, 278567, 316403, 347159, 423467, 425257, 427623
OFFSET
1,1
PROG
(PARI) is(n)=ispseudoprime(259*2^n-1) \\ Charles R Greathouse IV, Jun 13 2017
CROSSREFS
Sequence in context: A029650 A049307 A050113 * A366312 A323004 A264349
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