1,2
Table of n, a(n) for n=1..36.
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.
(PARI) is(n)=ispseudoprime(177*2^n-1) \\ Charles R Greathouse IV, Jun 13 2017
Sequence in context: A035123 A140212 A123132 * A118068 A108710 A108709
Adjacent sequences: A050837 A050838 A050839 * A050841 A050842 A050843
hard,nonn,changed
N. J. A. Sloane, Dec 29 1999
More terms from Herman Jamke (hermanjamke(AT)fastmail.fm), Jan 02 2008
approved