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A055694 11^n (mod n-1) = -1. 0
2, 3, 5, 7, 13, 62, 75, 378, 637, 2295, 10933, 24255, 31125, 50787, 53685, 55575, 176565, 193242, 243165, 290675, 415215, 579397, 728035, 728742, 741015, 760410, 1281423, 1447515, 1664205, 1975974, 4020030, 4794075, 5778525, 7189014 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

MATHEMATICA

Do[If[PowerMod[11, n, n-1]==n-2, Print[n]], {n, 2, 10^7}]

CROSSREFS

Sequence in context: A072826 A084761 A038965 * A007311 A031345 A206702

Adjacent sequences:  A055691 A055692 A055693 * A055695 A055696 A055697

KEYWORD

nonn

AUTHOR

Robert G. Wilson v (rgwv(AT)rgwv.com), Jun 09 2000

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Last modified February 16 03:44 EST 2012. Contains 205860 sequences.