id:A087020 - OEIS Search Results

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Greatest prime factor of n-th cyclic number.

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37, 5882353, 333667, 513239, 121499449, 11111111111111111111111, 154083204930662557781201849, 39526741, 9999999900000001, 59779577156334533866654838281, 119968369144846370226083377 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`A004042(n) factorized with Dario Alpern's ECM;` `a(n) = A006530(A004042(n)).`
	LINKS	`Dario A. Alpern, Factorization using the Elliptic Curve Method.` `Eric Weisstein's World of Mathematics, CyclicNumber`
	EXAMPLE	`A004042(1) = 142857 = 371311*3^3, therefore a(1) = 37.`
	CROSSREFS	`Cf. A001913, A087022.` `Sequence in context: A015037 A063681 A122787 this_sequence A023930 A022072 A037936` `Adjacent sequences: A087017 A087018 A087019 this_sequence A087021 A087022 A087023`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)lhsystems.com), Jul 30 2003`

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Last modified July 23 17:35 EDT 2008. Contains 142285 sequences.

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