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A077816 Wieferich numbers: n such that 2^phi(n) == 1 modulo n^2. +0
4
1093, 3279, 3511, 7651, 10533, 14209, 17555, 22953, 31599, 42627, 45643, 52665, 68859, 94797, 99463, 127881, 136929, 157995, 228215, 298389, 410787, 473985, 684645, 895167, 1232361, 2053935, 2685501, 3697083, 3837523, 6161805, 11512569 (list; graph; listen)
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Last modified December 10 12:37 EST 2009. Contains 170569 sequences.


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