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A050551 Numbers n such that 51*2^n-1 is prime. +0
1
1, 9, 10, 19, 22, 57, 69, 97, 141, 169, 171, 195, 238, 735, 885, 1287, 1365, 2026, 2211, 2361, 2889, 3159, 3709, 5031, 19066, 33622, 43162, 188517, 194875, 217971, 286965, 331546, 468417, 657705, 832630 (list; graph; listen)
OFFSET

1,2

COMMENT

845494 is also in the sequence. - Herman Jamke (hermanjamke(AT)fastmail.fm), Jan 02 2008

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

Adjacent sequences: A050548 A050549 A050550 this_sequence A050552 A050553 A050554

Sequence in context: A058369 A110939 A015898 this_sequence A022099 A042113 A041166

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 May 16 23:01 EDT 2008. Contains 139884 sequences.


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