A050893 Numbers n such that 269*2^n-1 is prime.

8, 24, 272, 2304, 3840, 3848, 58748, 63992, 104768, 264932, 628904

Offset

1,1

Links

Table of n, a(n) for n=1..11.

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(269*2^n-1) \\ Charles R Greathouse IV, Jun 13 2017

Crossrefs

Sequence in context: A094061 A182589 A002268 * A037025 A105063 A274303

Adjacent sequences: A050890 A050891 A050892 * A050894 A050895 A050896

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