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A050839
Numbers n such that 175*2^n-1 is prime.
0
1, 3, 9, 21, 23, 41, 47, 57, 69, 83, 193, 249, 291, 421, 433, 997, 1269, 1619, 1893, 2457, 3527, 9579, 14699, 15677, 16479, 21293, 30729, 33609, 47437, 143691, 244073, 244393, 282719, 309593, 387513, 529417
OFFSET
1,2
PROG
(PARI) is(n)=ispseudoprime(175*2^n-1) \\ Charles R Greathouse IV, Jun 13 2017
CROSSREFS
Sequence in context: A365919 A109612 A032668 * A032640 A245202 A127174
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