A032373 Numbers k such that 47*2^k+1 is prime.

583, 1483, 6115

Offset

1,1

Comments

Next term >= 4100000. - Joerg Arndt, Apr 07 2013

Links

Table of n, a(n) for n=1..3.

Ray Ballinger, Proth Search Page

Ray Ballinger and Wilfrid Keller, List of primes k.2^n + 1 for k < 300

Y. Gallot, Proth.exe: Windows Program for Finding Large Primes

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

Prog

(PARI) is(n)=ispseudoprime(47*2^n+1) \\ Charles R Greathouse IV, Feb 20 2017

Crossrefs

Sequence in context: A059468 A350663 A122694 * A236486 A236491 A235433

Adjacent sequences: A032370 A032371 A032372 * A032374 A032375 A032376

Keyword

nonn,hard,bref

Author

James R. Buddenhagen

Status

approved