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A050859 Numbers n such that 215*2^n-1 is prime. 0
2, 6, 14, 16, 38, 60, 64, 124, 198, 200, 210, 296, 890, 1486, 1646, 1848, 1906, 2540, 6908, 10430, 10848, 13636, 17858, 18386, 18916, 20802, 23936, 30620, 32858, 34860, 34990, 36978, 54394, 55298, 58822, 88508, 109130, 224036, 331784 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
Ray Ballinger and Wilfrid Keller, List of primes k.2^n + 1 for k < 300
PROG
(PARI) is(n)=ispseudoprime(215*2^n-1) \\ Charles R Greathouse IV, Jun 13 2017
CROSSREFS
Sequence in context: A128660 A212719 A145213 * A245289 A065196 A295326
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

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Last modified March 28 04:55 EDT 2024. Contains 371235 sequences. (Running on oeis4.)