A032373 - OEIS

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A032373

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

3

583, 1483, 6115

(list; graph; refs; listen; history; text; internal format)

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