

A032388


Numbers n such that 77*2^n+1 is prime.


0



3, 7, 19, 23, 95, 287, 483, 559, 655, 667, 1639, 9399, 39639, 63883, 71575, 164319, 401947, 614995
(list;
graph;
refs;
listen;
history;
text;
internal format)



OFFSET

1,1


LINKS

Table of n, a(n) for n=1..18.
Ray Ballinger, Proth Search Page
Ray Ballinger and Wilfrid Keller, List of primes k.2^n + 1 for k < 300
Y. Gallot, Proth.exe: Windows Program for Finding Large Primes
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


PROG

(PARI) is(n)=ispseudoprime(77*2^n+1) \\ Charles R Greathouse IV, Jun 13 2017


CROSSREFS

Sequence in context: A018432 A205302 A127925 * A050866 A226923 A001985
Adjacent sequences: A032385 A032386 A032387 * A032389 A032390 A032391


KEYWORD

nonn


AUTHOR

James R. Buddenhagen


EXTENSIONS

More terms from Hugo Pfoertner, Jun 20 2003
More terms (from http://web.archive.org/web/20161028080239/http://www.prothsearch.net/riesel.html), Joerg Arndt, Apr 07 2013


STATUS

approved



