A050835 Numbers n such that 167*2^n-1 is prime.

4, 6, 8, 10, 16, 32, 38, 42, 52, 456, 576, 668, 1082, 1512, 1614, 1922, 2072, 2672, 3210, 3616, 3682, 7754, 7906, 10536, 12282, 12338, 25162, 25460, 49672, 66318, 132738, 133188, 225232, 275680, 314000, 315872

Offset

1,1

Links

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.

Prog

(PARI) is(n)=ispseudoprime(167*2^n-1) \\ Charles R Greathouse IV, Jun 13 2017

Crossrefs

Sequence in context: A117347 A088011 A289424 * A369139 A294243 A349694

Adjacent sequences: A050832 A050833 A050834 * A050836 A050837 A050838

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