A050900 - OEIS

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A050900

Numbers n such that 283*2^n-1 is prime.

0

11, 55, 91, 99, 235, 319, 1835, 16731, 25471, 31199, 123975, 149351

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OFFSET

1,1

LINKS

Table of n, a(n) for n=1..12.

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(283*2^n-1) \\ Charles R Greathouse IV, Jun 13 2017

CROSSREFS

Sequence in context: A079884 A200172 A348025 * A246406 A255415 A153449

Adjacent sequences: A050897 A050898 A050899 * A050901 A050902 A050903

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