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A333506
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Numbers k that divide 19^k-1.
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2
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1, 2, 3, 4, 6, 8, 9, 10, 12, 16, 18, 20, 24, 27, 30, 32, 36, 40, 42, 48, 50, 54, 60, 64, 72, 80, 81, 84, 90, 96, 100, 108, 110, 120, 126, 128, 136, 144, 150, 156, 160, 162, 168, 180, 192, 200, 210, 216, 220, 240, 243, 250, 252, 256, 270, 272, 288, 294, 300, 312, 320, 324, 330, 336
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OFFSET
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1,2
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LINKS
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MATHEMATICA
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Join[{1}, Select[Range[2, 336], PowerMod[19, #, #] == 1 &]] (* Amiram Eldar, May 05 2021 *)
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PROG
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(PARI) for(k=1, 1e3, if(Mod(19, k)^k==1, print1(k", ")))
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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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