id:A055688 - OEIS Search Results

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Numbers n such that 5^n (mod n-1) = -1.

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2, 3, 7, 14, 15, 175, 855, 2695, 78127, 103974, 106695, 121975, 420210, 487375, 1299375, 2174655, 3895095, 4151455, 5842215, 5951130, 6508335, 10637005, 20117895, 24482958, 31999695, 32282054, 32620203, 32872455, 34258455 (list; graph; listen)

	OFFSET	`1,1`
	MATHEMATICA	`Do[If[PowerMod[5, n, n-1]==n-2, Print[n]], {n, 2, 10^8}]`
	CROSSREFS	`Adjacent sequences: A055685 A055686 A055687 this_sequence A055689 A055690 A055691` `Sequence in context: A073827 A081940 A082270 this_sequence A081941 A027957 A054194`
	KEYWORD	`nonn`
	AUTHOR	`Robert G. Wilson v (rgwv(AT)rgwv.com), Jun 09 2000`

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Last modified October 10 20:39 EDT 2008. Contains 144831 sequences.

AT&T Labs Research