

A053358


Numbers k such that 283*2^k + 1 is prime.


0




OFFSET

1,1


LINKS

Table of n, a(n) for n=1..10.
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[283*2^# + 1] &] (* G. C. Greubel, May 24 2018 *)


PROG

(PARI) is(n)=ispseudoprime(283*2^n+1) \\ Charles R Greathouse IV, Jun 13 2017
(MAGMA) [n: n in [1..5000]  IsPrime(283*2^n+1)]; // G. C. Greubel, May 24 2018


CROSSREFS

Sequence in context: A126525 A230615 A230731 * A163667 A214944 A259455
Adjacent sequences: A053355 A053356 A053357 * A053359 A053360 A053361


KEYWORD

hard,nonn,more


AUTHOR

N. J. A. Sloane, Dec 29 1999


EXTENSIONS

a(8)a(9) from the Ray Ballinger and Wilfrid Keller link by Robert Price, Dec 20 2018
a(10) from Jeppe Stig Nielsen, Jan 19 2020


STATUS

approved



