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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: A244344 A059468 A122694 * A236486 A236491 A235433

Adjacent sequences:  A032370 A032371 A032372 * A032374 A032375 A032376

KEYWORD

nonn,hard,bref

AUTHOR

James R. Buddenhagen

STATUS

approved

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Last modified January 22 19:47 EST 2020. Contains 331153 sequences. (Running on oeis4.)