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A215611
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Odd integers n such that 2^n == 2^8 (mod n).
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11
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1, 127, 3473, 19313, 30353, 226703, 230777, 345023, 929783, 1790159, 1878073, 2569337, 3441743, 4213511, 8026103, 9770153, 19139183, 24261623, 30652223, 35482433, 38044223, 40642103, 55015793, 65046479, 67411121, 69601193, 119611073
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OFFSET
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1,2
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COMMENTS
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Also, the odd solutions to 2^(n-8) == 1 (mod n). The only even solution is n=8.
For all m, 2^A051447(m)-1 belongs to this sequence.
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LINKS
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MATHEMATICA
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m = 2^8; Join[Select[Range[1, m, 2], Divisible[2^# - m, #] &],
Select[Range[m + 1, 10^6, 2], PowerMod[2, #, #] == m &]] (* Robert Price, Oct 12 2018 *)
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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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