A032497 Numbers n such that 241*2^n+1 is prime.
36, 72, 288, 5528, 8904, 9876, 130992
Offset: 1
Links
- Ray Ballinger, Proth Search Page
- Ray Ballinger & Wilfrid Keller, List of primes k.2^n + 1 for k < 300.
- Index entries for sequences of n such that k*2^n-1 (or k*2^n+1) is prime
Programs
-
PARI
is(n)=ispseudoprime(241*2^n+1) \\ Charles R Greathouse IV, Jun 07 2017
Extensions
One more term (from the Ballinger-Keller web page) from M. F. Hasler, Apr 18 2007