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A124246 Numbers n such that n divides 5^n - 2. 2
1, 3, 123, 202884639, 242405133, 92273577267, 2670733723929 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

COMMENTS

There is no further term up to 10^13.

Some larger terms: 60092749466423900486673922957841, 401021769827858799355246286337987697472836927856337282726789534497163

MATHEMATICA

Do[If[Mod[(PowerMod[5, n, n]-2), n]==0, Print[n]], {n, 1000000000}]

CROSSREFS

Cf. A123062.

Sequence in context: A171357 A012569 A078258 * A037118 A152859 A085531

Adjacent sequences:  A124243 A124244 A124245 * A124247 A124248 A124249

KEYWORD

more,nonn

AUTHOR

Farideh Firoozbakht (mymontain(AT)yahoo.com), Nov 19 2006

EXTENSIONS

a(6) from Max Alekseyev (maxale(AT)gmail.com), Jul 28 2009

a(7) from Max Alekseyev (maxale(AT)gmail.com), Jun 02 2010

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Last modified February 17 09:09 EST 2012. Contains 206003 sequences.