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Search: id:A110059
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| A110059 |
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Smallest prime ending a complete Cunningham chain of the second kind (2x-1) of length n. |
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+0
5
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| 11, 13, 5, 17041, 24481, 12338881, 1065601, 1985902081, 219416417281, 105230562877441, 1422461638625281, 444124661486837761, 3105111850422067201
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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"Complete" means that the chain is not part of a longer chain.
A109828 has the first prime of each chain.
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LINKS
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Chris Caldwell's Prime Glossary, Cunningham chains.
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EXAMPLE
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a(4)=17041 because 2131,4261,8521,17041 are prime, but the preceding and following numbers (1066,34081) are not.
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CROSSREFS
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Cf. A005382, A005384, A057326, A059761, A109828.
Sequence in context: A156338 A034080 A107805 this_sequence A004476 A112133 A052258
Adjacent sequences: A110056 A110057 A110058 this_sequence A110060 A110061 A110062
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KEYWORD
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nonn
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AUTHOR
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Alexandre Wajnberg (alexandre.wajnberg(AT)ulb.ac.be), Sep 04 2005
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EXTENSIONS
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Some terms computed by Gilles Sadowski.
Edited by Don Reble (djr(AT)nk.ca), May 16 2006
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