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A055691
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Numbers k such that 8^k == -1 (mod k-1).
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3
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2, 6, 14, 66, 186, 378, 546, 1190, 1470, 2406, 4470, 5250, 7086, 18578, 20166, 25806, 42602, 58590, 69006, 85566, 134946, 137346, 170586, 187838, 206646, 262146, 272610, 285390, 289394, 420210, 500570, 538734, 592410, 595686, 602250, 618450
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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[8, n, n-1]==n-2, Print[n]], {n, 2, 10^7}]
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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