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A050839 Numbers n such that 175*2^n-1 is prime. +0
1
1, 3, 9, 21, 23, 41, 47, 57, 69, 83, 193, 249, 291, 421, 433, 997, 1269, 1619, 1893, 2457, 3527, 9579, 14699, 15677, 16479, 21293, 30729, 33609, 47437, 143691, 244073, 244393, 282719, 309593, 387513, 529417 (list; graph; listen)
OFFSET

1,2

LINKS

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

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

Kosmaj, Riesel list k<300.

CROSSREFS

Sequence in context: A006077 A109612 A032668 this_sequence A032640 A127174 A044055

Adjacent sequences: A050836 A050837 A050838 this_sequence A050840 A050841 A050842

KEYWORD

hard,nonn

AUTHOR

njas, Dec 29 1999

EXTENSIONS

More terms from Herman Jamke (hermanjamke(AT)fastmail.fm), Jan 02 2008

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Last modified July 8 18:40 EDT 2008. Contains 141013 sequences.


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