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 A119715 a(n) = least k such that the remainder when 7^k is divided by k is n. 40
 2, 5, 46, 339, 22, 387497, 11, 535, 10, 111, 38, 8399, 15, 497, 34, 327, 365, 515, 30, 7219931, 28, 321, 26, 223793, 44, 10718597, 242, 35, 2330, 209, 39, 305, 136, 309, 4382, 10596486211, 45, 24751, 7327, 121, 236, 78821, 55, 4117, 76, 1751, 30514339, 83795, 50, 1333 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS MATHEMATICA t = Table[0, {10000}]; k = 1; lst = {}; While[k < 4100000000, a = PowerMod[7, k, k]; If[ a<10001 && t[[a]]==0, t[[a]]=k; Print[{a, k}]]; k++ ]; t (* changed (to reflect the new limits) by Robert G. Wilson v, Jul 17 2009 *) CROSSREFS Cf. A036236, A078457, A119678, A119679, A127816, A119714, A127817, A127818, A127819, A127820, A127821. Sequence in context: A005166 A121621 A225147 * A326965 A023273 A041729 Adjacent sequences:  A119712 A119713 A119714 * A119716 A119717 A119718 KEYWORD nonn AUTHOR Ryan Propper, Jun 12 2006 EXTENSIONS a(36) = 10596486211 and later terms from Ryan Propper, Feb 02 2007 STATUS approved

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Last modified September 18 23:09 EDT 2021. Contains 347548 sequences. (Running on oeis4.)