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A128669
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Primes p such that p^2 divides 23^(p-1) - 1.
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5
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OFFSET
| 1,1
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COMMENTS
| No further terms up to 3.127*10^13.
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LINKS
| Richard Fischer, Fermat quotients B^(P-1) == 1 (mod P^2)
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CROSSREFS
| Cf. A001220, A014127, A123692, A123693, A128667, A128668, A090968, A039951
Sequence in context: A013798 A055324 A055313 * A013866 A014384 A185213
Adjacent sequences: A128666 A128667 A128668 * A128670 A128671 A128672
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KEYWORD
| hard,more,nonn
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AUTHOR
| Alexander Adamchuk (alex(AT)kolmogorov.com), Mar 26 2007
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