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A128668
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Primes p such that p^2 divides 17^(p-1) - 1.
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6
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OFFSET
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1,1
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COMMENTS
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Mossinghoff showed that there are no further terms up to 10^14.
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LINKS
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Table of n, a(n) for n=1..5.
Richard Fischer, Fermat quotients B^(P-1) == 1 (mod P^2)
M. J. Mossinghoff, Wieferich pairs and Barker sequences, Des. Codes Cryptogr. 53 (2009), 149-163.
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CROSSREFS
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Cf. A001220, A014127, A123692, A123693, A128667, A090968, A128669, A039951.
Sequence in context: A197635 A171161 A101445 * A216977 A038537 A120313
Adjacent sequences: A128665 A128666 A128667 * A128669 A128670 A128671
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KEYWORD
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hard,more,nonn
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AUTHOR
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Alexander Adamchuk, Mar 26 2007
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EXTENSIONS
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The prime 478225523351 was found by Richard Fischer on Oct 25 2005
Extension corrected by Jonathan Sondow, Jun 24 2010
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STATUS
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approved
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