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 A127821 a(n) = least k such that the remainder of 13^k divided by k is n. 49
 2, 11, 5, 51, 44, 7, 15, 371285, 10, 74853, 158, 13757837, 17, 5805311, 22, 2181, 38, 25, 30, 9667, 74, 87, 146, 23441, 88, 19629779, 35, 45, 70, 235433, 46, 55, 34, 309, 134 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS a(36) > 10^16. - Max Alekseyev, Oct 25 2016 LINKS 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 31 2016 [With 207 new terms, this supersedes the earlier table from Robert G. Wilson v et al.] Robert G. Wilson v et al., Table of n, a(n) for n = 1..10000 with -1 for large entries where a(n) has not yet been found, Feb 06 2007; Nov 30 2010. MATHEMATICA t = Table[0, {10000} ]; k = 1; While[ k < 3500000000, a = PowerMod[13, k, k]; If[a < 10001 && t[[a]] == 0, t[[a]] = k; Print[{a, k}]]; k++ ]; t CROSSREFS Cf. A036236, A078457, A119678, A119679, A127816, A119715, A119714, A127817, A127818, A127819, A127820. Sequence in context: A124688 A339807 A158616 * A114724 A226219 A285866 Adjacent sequences:  A127818 A127819 A127820 * A127822 A127823 A127824 KEYWORD nonn,hard,more AUTHOR Alexander Adamchuk, Jan 30 2007 EXTENSIONS More terms from Robert G. Wilson v, Feb 06 2007 a(264), a(798), a(884), a(896), a(976), a(980), a(152), a(171), a(296), a(464), a(824), a(870) from Daniel Morel, Jun 17, Nov 30 2010 STATUS approved

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Last modified July 29 04:48 EDT 2021. Contains 346340 sequences. (Running on oeis4.)