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A242865
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Numbers n such that 3^(n - 3) is congruent to 1 modulo n.
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4
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3, 9299, 31903, 50963, 87043, 115918, 116891, 219827, 241043, 394243, 550243, 617503, 760243, 806623, 1029253, 1050787, 1458083, 1642798, 1899458, 2864755, 3205387, 3588115, 3839363, 4164578, 5041223, 5610583, 5834755, 5977555, 7837903, 8005558, 8067433, 8128823, 9007603, 9298903, 9449113, 9617443, 9835843
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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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Select[Range[10^4], Mod[3^(# - 3), #] == 1 &] (* Alonso del Arte, May 27 2014 *)
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PROG
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(PARI) for(n=3, 10^6, if(Mod(3, n)^(n-3)==1, print1(n, ", ")))
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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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