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A110024
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Smallest primes starting a complete three iterations Cunningham chain of the second kind.
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6
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2131, 2311, 6211, 7411, 10321, 18121, 22531, 23011, 24391, 29671, 31771, 35311, 41491, 46411, 54601, 56311, 60331, 61381, 67651, 78031, 85381, 96931, 99871, 109471, 126001, 134731, 156691, 162451, 165331, 170851, 185131, 205171, 224401
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| The word "complete" indicates each chain is exactly 4 primes long (i.e., the chain cannot be a subchain of another one). Other sequences give also primes included in longer chains ("starting" them or not).
Terms computed by Gilles Sadowski.
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LINKS
| Chris Caldwell's Prime Glossary, Cunningham chains.
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EXAMPLE
| 2311 is here because, through the operator <*2-1> of the chains of the second kind,
2311 -> 4621 -> 9241 -> 18481 and the chain ends here (with this operator).
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CROSSREFS
| Cf. A023272, A023302, A023330, A005384, A005385, A059452, A059455, A007700
Cf. A059759, A059760, A059761, A059762, A059763, A059764, A059765, A038397, A104349, A091314, A069362, A016093, A014937, A057326.
Sequence in context: A205949 A205460 A066817 * A157768 A067199 A064249
Adjacent sequences: A110021 A110022 A110023 * A110025 A110026 A110027
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KEYWORD
| easy,nonn
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AUTHOR
| Alexandre Wajnberg (alexandre.wajnberg(AT)ulb.ac.be), Sep 03 2005
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EXTENSIONS
| Edited and extended by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), May 08 2009
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