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A328138
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Numbers m that divide 9^m + 8.
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0
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OFFSET
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1,2
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COMMENTS
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Conjecture: For n > 1, k^n == 1-k (mod n) has an infinite number of positive solutions.
a(6) > 10^12. No term can be a multiple of 2, 3, 5, 7, or 13. Also terms: 228454543831049 and 4879573990210017348077958628152400091281634488825721395187. - Giovanni Resta, Oct 07 2019
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LINKS
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PROG
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(Magma) [1] cat [n: n in [1..10^8] | Modexp(9, n, n) + 8 eq n];
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CROSSREFS
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KEYWORD
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nonn,more
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AUTHOR
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STATUS
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approved
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