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A123693
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Primes p such that p^2 divides 7^(p-1) - 1.
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10
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OFFSET
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1,1
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COMMENTS
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Dorais and Klyve proved that there are no further terms up to 9.7*10^14.
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LINKS
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Table of n, a(n) for n=1..2.
F. G. Dorais and D. Klyve, A Wieferich prime search up to p < 6.7*10^15, J. Integer Seq. 14 (2011), Art. 11.9.2, 1-14.
W. Keller and J. Richstein, Fermat quotients q_p(a) that are divisible by p.
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CROSSREFS
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Cf. A001220, A014127, A123692, A123693, A128667, A128668, A090968, A039951, A128669
Sequence in context: A152516 A067509 A067502 * A111727 A115738 A115763
Adjacent sequences: A123690 A123691 A123692 * A123694 A123695 A123696
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KEYWORD
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bref,hard,nonn,more
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AUTHOR
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Max Alekseyev, Oct 07 2006
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EXTENSIONS
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Updated by Max Alekseyev, Jan 29 2012
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STATUS
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approved
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