

A053361


Numbers k such that 289*2^k + 1 is prime.


0



10, 22, 34, 42, 150, 1758, 6706, 11634, 18502, 52614, 102150, 194830, 207546, 252858, 333406, 638902, 989182, 1117182, 1317378, 1522650
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OFFSET

1,1


LINKS

Table of n, a(n) for n=1..20.
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^n1 (or k*2^n+1) is prime


MATHEMATICA

Select[Range[5*10^3], PrimeQ[289*2^# + 1] &] (* G. C. Greubel, May 25 2018 *)


PROG

(PARI) is(n)=ispseudoprime(289*2^n+1) \\ Charles R Greathouse IV, Jun 13 2017
(Magma) [n: n in [1..3000]  IsPrime(289*2^n+1)]; // G. C. Greubel, May 25 2018


CROSSREFS

Sequence in context: A302280 A350627 A109958 * A214153 A179887 A339003
Adjacent sequences: A053358 A053359 A053360 * A053362 A053363 A053364


KEYWORD

hard,nonn,more


AUTHOR

N. J. A. Sloane, Dec 29 1999


EXTENSIONS

a(11)a(20) from the Ray Ballinger and Wilfrid Keller link by Robert Price, Dec 22 2018


STATUS

approved



