

A128365


a(n) = least k such that the remainder when 25^k is divided by k is n.


17



2, 23, 11, 7, 10, 19, 57, 17, 14, 15, 614, 13, 34
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OFFSET

1,1


COMMENTS

a(14) > 10^15.  Max Alekseyev, Apr 14 2012


LINKS

Table of n, a(n) for n=1..13.
Robert G. Wilson v, Table of n, a(n) for n = 1..10000 with 1 for large entries where a(n) has not yet been found
Fausto A. C. Cariboni, Table of n, a(n) for n = 1..10000 with 1 for large entries where a(n) has not yet been found, Oct 30 2016 [With 182 new terms, this supersedes the earlier table from Robert G. Wilson v]


MATHEMATICA

t = Table[0, {10000} ]; k = 1; While[ k < 4000000000, a = PowerMod[25, k, k]; If[a < 10001 && t[[a]] == 0, t[[a]] = k; Print[{a, k}]]; k++ ]; t (* Robert G. Wilson v, Aug 04 2009 *)


CROSSREFS

Cf. A128361, A128362, A128363, A128364, A128366, A128367, A128368, A128369, A129370, A128371, A128372.
Cf. A036236, A078457, A119678, A119679, A127816, A119715, A119714, A127817, A127818, A127819, A127820, A127821, A128154, A128155, A128156, A128157, A128158, A128159, A128160.
Cf. A128149, A128150, A128172.
Sequence in context: A237579 A104644 A158992 * A153654 A153656 A242037
Adjacent sequences: A128362 A128363 A128364 * A128366 A128367 A128368


KEYWORD

hard,more,nonn


AUTHOR

Alexander Adamchuk, Feb 27 2007


STATUS

approved



