OFFSET
1,1
LINKS
Ray Ballinger, Proth Search Page
Wilfrid Keller, List of primes k.2^n - 1 for k < 300
Prime Pages, Database Search Output
PROG
(Magma) [n: n in [1..3500] |IsPrime(61*2^n + 1)] // Vincenzo Librandi, Nov 20 2010
(PARI) is(n)=ispseudoprime(61*2^n+1) \\ Charles R Greathouse IV, Jun 13 2017
CROSSREFS
KEYWORD
nonn,hard
AUTHOR
EXTENSIONS
More terms (from http://web.archive.org/web/20161028080239/http://www.prothsearch.net/riesel.html), Joerg Arndt, Apr 07 2013
a(9) communicated by Jeppe Stig Nielsen, Feb 25 2024
STATUS
approved