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A050835 Numbers n such that 167*2^n-1 is prime. 0
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 (list; graph; refs; listen; history; text; internal format)
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 * A294243 A298473 A054284

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

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Last modified April 20 02:06 EDT 2019. Contains 322291 sequences. (Running on oeis4.)