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A032361 Numbers n such that 23*2^n+1 is prime. 1
1, 9, 13, 29, 41, 49, 69, 73, 341, 381, 389, 649, 1961, 3929 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

LINKS

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

CROSSREFS

Sequence in context: A107913 A175532 A098074 * A031196 A151725 A146864

Adjacent sequences:  A032358 A032359 A032360 * A032362 A032363 A032364

KEYWORD

nonn,hard

AUTHOR

Jim Buddenhagen (jbuddenh(AT)gmail.com)

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Last modified February 17 19:13 EST 2012. Contains 206085 sequences.