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A110025
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Smallest primes starting a complete three iterations Cunningham chain of the first or second kind.
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3
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509, 1229, 1409, 2131, 2311, 2699, 3539, 6211, 6449, 7411, 10321, 10589, 11549, 11909, 12119, 17159, 18121, 19709, 19889, 22349, 22531, 23011, 24391, 26189, 27479, 29671, 30389, 31771, 35311, 41491, 43649, 46411, 54601, 55229, 56311
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| Terms computed by Gilles Sadowski.
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LINKS
| Chris Caldwell's Prime Glossary, Cunningham chains.
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FORMULA
| Union of A059763 and A110024. [R. J. Mathar (mathar(AT)strw.leidenuniv.nl), May 08 2009]
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EXAMPLE
| 1409 is here because, through the operator <2p+1> for chains of the first kind, 1409 -> 2819 -> 5639 -> 11279 and the chain ends here.
2131 is here because, through the operator <2p-1> for chains of the second kind, 2131 -> 4261 -> 8521 -> 17041 and the chain ends here.
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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: A159686 A142819 A183058 * A059763 A126438 A126582
Adjacent sequences: A110022 A110023 A110024 * A110026 A110027 A110028
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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 by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), May 08 2009
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