id:A055685 - OEIS Search Results

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Numbers n such that 2^n (mod n-1) == -1.

+0
2

2, 6, 66, 378, 1190, 1470, 25806, 58590, 134946, 137346, 170586, 272610, 285390, 420210, 538734, 592410, 618450, 680706, 778806, 1163066, 1520442, 1700946, 2099202, 2831010, 4020030, 4174170, 4285390, 4516110, 5059890, 5215770 (list; graph; listen)

	OFFSET	`1,1`
	MATHEMATICA	`Do[If[PowerMod[2, n, n-1]==n-2, Print[n]], {n, 2, 12900000}]`
	CROSSREFS	`Cf. A064935.` `Sequence in context: A061999 A066756 A070872 this_sequence A046399 A082619 A082617` `Adjacent sequences: A055682 A055683 A055684 this_sequence A055686 A055687 A055688`
	KEYWORD	`nonn`
	AUTHOR	`Robert G. Wilson v (rgwv(AT)rgwv.com), Jun 09 2000`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

AT&T Labs Research