Search: id:a218584
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A218584
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Numbers n such that 2^A000010(n*x) == 1 (mod (n*x)^2), where x = 3837523 is the product of the first 2 Wieferich primes 1093 and 3511.
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1
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1, 3, 5, 7, 9, 13, 15, 21, 27, 35, 39, 45, 63, 65, 81, 91, 105, 117, 135, 169, 189, 195, 273, 315, 351, 405, 455, 507, 567, 585, 819, 845, 945, 1053, 1183, 1365, 1521, 1701, 1755, 2457, 2535, 2835, 3159, 3549, 4095, 4563, 5265, 5915, 7371, 7605, 8505, 10647
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OFFSET
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1,2
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COMMENTS
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If this sequence is finite, then there are finitely many Wieferich primes (A001220).
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LINKS
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MATHEMATICA
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x = 3837523; Select[Range[1, 10647, 2], PowerMod[2, EulerPhi[#*x], (#*x)^2] == 1 &]
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PROG
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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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