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A055695
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Numbers k such that 12^k == -1 (mod k-1).
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3
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2, 6, 30, 146, 42486, 102966, 597198, 2847366, 7998606, 13133666, 30478158, 67622310, 74476206, 101258190, 105161166, 106364286, 187605438, 230000550, 242915166, 401913582, 406756350, 444314574, 848205078, 899715894, 1508418054, 1575220350, 1578086334, 1691859102
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OFFSET
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1,1
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LINKS
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MATHEMATICA
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Do[If[PowerMod[12, n, n-1]==n-2, Print[n]], {n, 2, 10^8}]
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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