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A128667 Primes p such that p^2 divides 13^(p-1) - 1. 12
2, 863, 1747591 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

No further terms up to 3.127*10^13.

LINKS

Table of n, a(n) for n=1..3.

C. K. Caldwell, Fermat quotient

Richard Fischer, Fermat quotients B^(P-1) == 1 (mod P^2)

CROSSREFS

Cf. A001220, A014127, A123692, A123693, A128668, A090968, A128669, A039951

Sequence in context: A145748 A141185 A257660 * A199947 A230569 A239149

Adjacent sequences:  A128664 A128665 A128666 * A128668 A128669 A128670

KEYWORD

bref,hard,more,nonn

AUTHOR

Alexander Adamchuk, Mar 26 2007

STATUS

approved

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Last modified December 7 13:07 EST 2016. Contains 278875 sequences.