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Search: id:A061075
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| A061075 |
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Greatest prime number p(n) with decimal fraction period of length n. |
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+0
4
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| 3, 11, 37, 101, 271, 13, 4649, 137, 333667, 9091, 513239, 9901, 265371653, 909091, 2906161, 5882353, 5363222357, 52579, 1111111111111111111, 27961, 10838689, 8779, 11111111111111111111111, 99990001, 182521213001, 1058313049
(list; graph; listen)
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OFFSET
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1,1
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LINKS
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Index entries for sequences related to decimal expansion of 1/n
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EXAMPLE
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1/271 = 0.0036900369, period of n=5 for p(5)=271
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PROGRAM
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(PARI) a(n)=local(p); if(n<1, 0, p=factor(subst(polcyclo(n), x, 10))~[1, ]; p[length(p)])
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CROSSREFS
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Cf. A007138, A003020, A005422.
Sequence in context: A095088 A007138 A046107 this_sequence A005422 A040017 A007615
Adjacent sequences: A061072 A061073 A061074 this_sequence A061076 A061077 A061078
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KEYWORD
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nonn,nice
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AUTHOR
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Heiner Muller-Merbach (hmm(AT)sozwi.uni-kl.de), May 29 2001
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