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A001270
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Table of prime factors of 10^n - 1 (with multiplicity).
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9
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3, 3, 3, 3, 11, 3, 3, 3, 37, 3, 3, 11, 101, 3, 3, 41, 271, 3, 3, 3, 7, 11, 13, 37, 3, 3, 239, 4649, 3, 3, 11, 73, 101, 137, 3, 3, 3, 3, 37, 333667, 3, 3, 11, 41, 271, 9091, 3, 3, 21649, 513239, 3, 3, 3, 7, 11, 13, 37, 101, 9901, 3, 3, 53, 79, 265371653
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OFFSET
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1,1
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COMMENTS
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The length of the n-th row is A057951(n).
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REFERENCES
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J. Brillhart et al., Factorizations of b^n +- 1. Contemporary Mathematics, Vol. 22, Amer. Math. Soc., Providence, RI, 2nd edition, 1985; and later supplements.
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LINKS
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J. Brillhart et al., Factorizations of b^n +- 1, Contemporary Mathematics, Vol. 22, Amer. Math. Soc., Providence, RI, 3rd edition, 2002.
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MATHEMATICA
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Table[f = FactorInteger[10^n - 1]; Flatten[Table[Table[i[[1]], {i[[2]]}], {i, f}]], {n, 13}] (* T. D. Noe, Jun 27 2012 *)
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CROSSREFS
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KEYWORD
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nonn,tabf
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AUTHOR
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EXTENSIONS
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b-file corrected and extended with rows 323..352 by Max Alekseyev, May 23 2023
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STATUS
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approved
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