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A038699 Smallest prime of form n*2^m-1, m >= 0, or 0 if no such prime exists. +0
5
3, 3, 2, 3, 19, 5, 13, 7, 17, 19, 43, 11, 103, 13, 29, 31, 67, 17, 37, 19, 41, 43, 367, 23, 199, 103, 53, 223, 463, 29, 61, 31, 131, 67, 139, 71, 73, 37, 311, 79, 163, 41, 5503, 43, 89, 367, 751, 47, 97, 199, 101, 103, 211, 53, 109, 223, 113, 463, 241663, 59, 487, 61 (list; graph; listen)
OFFSET

1,1

CROSSREFS

Primes arising in A040081 (or 0 if no prime exists).

Cf. A040081, A050921.

Sequence in context: A123676 A122775 A086632 this_sequence A064655 A049604 A106686

Adjacent sequences: A038696 A038697 A038698 this_sequence A038700 A038701 A038702

KEYWORD

nonn,easy,nice

AUTHOR

njas, Dec 30 1999

EXTENSIONS

More terms from Henry Bottomley (se16(AT)btinternet.com), Apr 24 2001

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Last modified November 21 14:49 EST 2008. Contains 150807 sequences.


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