A050908 - OEIS

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A050908

Numbers n such that 299*2^n-1 is prime.

0

4, 8, 12, 32, 52, 80, 84, 112, 140, 144, 532, 5388, 6308, 19752, 34456, 35820, 45780, 119852, 211324, 233188, 295640

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OFFSET

1,1

LINKS

Table of n, a(n) for n=1..21.

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(299*2^n-1) \\ Charles R Greathouse IV, Jun 13 2017

CROSSREFS

Sequence in context: A081833 A370134 A035403 * A232901 A038563 A083492

Adjacent sequences: A050905 A050906 A050907 * A050909 A050910 A050911

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