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A032405 Numbers n such that 111*2^n+1 is prime. 0
1, 4, 28, 32, 44, 47, 71, 128, 137, 193, 676, 2344, 7828, 10883, 21596, 31724, 47783, 49816, 61300 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..19.

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(111*2^n+1) \\ Charles R Greathouse IV, Jun 13 2017

CROSSREFS

Sequence in context: A153431 A043074 A137314 * A179279 A061428 A069518

Adjacent sequences:  A032402 A032403 A032404 * A032406 A032407 A032408

KEYWORD

nonn

AUTHOR

James R. Buddenhagen

STATUS

approved

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Last modified November 13 13:15 EST 2018. Contains 317149 sequences. (Running on oeis4.)