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A050865
Numbers n such that 227*2^n-1 is prime.
0
2, 4, 8, 12, 14, 26, 32, 80, 124, 230, 284, 562, 866, 1830, 2630, 3122, 3428, 6278, 9900, 19888, 20092, 22706, 29088, 31412, 44402, 47914, 53120, 102330, 135164, 299306, 345918
OFFSET
1,1
PROG
(PARI) is(n)=ispseudoprime(227*2^n-1) \\ Charles R Greathouse IV, Jun 13 2017
CROSSREFS
Sequence in context: A160162 A328838 A064711 * A354109 A354919 A288514
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