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A032407 Numbers n such that 115*2^n+1 is prime. 0
2, 12, 20, 26, 42, 114, 228, 396, 456, 482, 1298, 3048, 4968, 7568, 28004, 32466, 40548, 66576, 78588, 101016, 120650 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..21.

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

Ray Ballinger, Proth Search Page

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

CROSSREFS

Sequence in context: A069164 A067762 A137311 * A136725 A023534 A226399

Adjacent sequences:  A032404 A032405 A032406 * A032408 A032409 A032410

KEYWORD

nonn

AUTHOR

James R. Buddenhagen

EXTENSIONS

Extended by Hugo Pfoertner, Jul 2 2003

STATUS

approved

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Last modified June 20 06:31 EDT 2013. Contains 226422 sequences.