OFFSET
1,1
LINKS
Ray Ballinger, Proth Search Page
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
PROG
(PARI) is(n)=ispseudoprime(49*2^n+1) \\ Charles R Greathouse IV, Jun 12 2017
CROSSREFS
KEYWORD
nonn
AUTHOR
EXTENSIONS
More terms (from http://web.archive.org/web/20161028080239/http://www.prothsearch.net/riesel.html), Joerg Arndt, Apr 07 2013
a(25) from Jeppe Stig Nielsen, Sep 22 2019
STATUS
approved