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A333743
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Odd numbers k such that the multiplicative orders of 2 modulo k and modulo k+2 are equal.
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3
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109, 157, 307, 427, 499, 811, 1015, 1183, 1459, 2013, 2251, 2715, 3181, 3259, 3439, 3541, 3889, 3963, 4303, 4339, 4553, 4909, 5197, 6421, 6661, 6997, 8389, 8707, 8779, 9067, 9109, 9663, 10531, 10597, 11731, 12243, 12259, 13009, 13789, 14347, 14437, 14583, 16143
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OFFSET
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1,1
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LINKS
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EXAMPLE
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109 is a term since the multiplicative orders of 2 modulo 109 and modulo 111 are both equal to 36.
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MATHEMATICA
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Select[Range[1, 10^4, 2], MultiplicativeOrder[2, #] == MultiplicativeOrder[2, # + 2] &]
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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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