OFFSET
1,2
LINKS
Jeppe Stig Nielsen, Table of n, a(n) for n = 1..75 (terms n = 1..71 from Robert Price)
Ray Ballinger, Proth Search Page
Ray Ballinger and Wilfrid Keller, List of primes k*2^n + 1 for 300 < k < 600
Wilfrid Keller, List of primes k*2^n - 1 for k < 300
Eric Weisstein's World of Mathematics, Proth Prime
MAPLE
select(k->isprime(393*2^k+1), [$1..1000]); # Muniru A Asiru, Jan 03 2019
MATHEMATICA
Select[Range[1000], PrimeQ[393*2^# + 1] &]
PROG
(Magma) [n: n in [0.. 4000] | IsPrime(393*2^n+1)]; // Vincenzo Librandi, Jan 04 2019
CROSSREFS
KEYWORD
nonn,hard
AUTHOR
Robert Price, Jan 03 2019
STATUS
approved