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A050906 Numbers n such that 295*2^n-1 is prime. 0
5, 23, 35, 53, 59, 65, 113, 149, 205, 275, 365, 503, 1019, 2105, 2473, 2999, 4813, 8873, 10985, 16495, 32065, 47689, 52727, 63413, 177695, 374035, 389903 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..27.

Ray Ballinger and Wilfrid Keller, List of primes k.2^n + 1 for k < 300

Wilfrid Keller, List of primes k.2^n - 1 for k < 300

Index entries for sequences of n such that k*2^n-1 (or k*2^n+1) is prime

Kosmaj, Riesel list k<300.

PROG

(PARI) is(n)=ispseudoprime(295*2^n-1) \\ Charles R Greathouse IV, Jun 13 2017

CROSSREFS

Sequence in context: A231002 A329160 A337436 * A195974 A098421 A044447

Adjacent sequences:  A050903 A050904 A050905 * A050907 A050908 A050909

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 January 19 08:18 EST 2022. Contains 350464 sequences. (Running on oeis4.)