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A051919
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Start with n, apply k->2k+1 until reach new record prime; sequence gives record primes.
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2
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3, 7, 11, 31, 79, 191, 223, 8191, 73727, 81919, 738197503, 51539607551, 3232601036663613174009984612954335460652964980182760163363015849805536730581466940964863
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,1
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EXAMPLE
| 0->1->3, new record prime 3 in 2 steps; 1->3->7, new record prime 7 in 2 steps; 2->5->11, new record prime 11 in 2 steps; 3->7->15->31, new record prime 31 in 3 steps; ...
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CROSSREFS
| Cf. A051918, A052333.
Sequence in context: A131588 A091938 A186893 * A119175 A038913 A141178
Adjacent sequences: A051916 A051917 A051918 * A051920 A051921 A051922
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KEYWORD
| nice,nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), Dec 18 1999
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EXTENSIONS
| More terms from Naohiro Nomoto (6284968128(AT)geocities.co.jp), May 21 2001, who reports that the next term is > 10^130.
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