OFFSET
1,1
COMMENTS
Next term >= 4100000. - Joerg Arndt, Apr 07 2013
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(47*2^n+1) \\ Charles R Greathouse IV, Feb 20 2017
CROSSREFS
KEYWORD
nonn,hard,bref
AUTHOR
STATUS
approved