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 A321364 Positive integers m such that 13^m == 12 (mod m). 1
 1, 13757837, 6969969233, 514208575135 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS No other terms below 10^15. Some larger terms: 14551705803598782884189, 268766423508299769671017810348321281664525668552158231. LINKS PROG (PARI) is(n) = Mod(13, n)^n==12 \\ Felix FrÃ¶hlich, Nov 08 2018 CROSSREFS Solutions to 13^m == k (mod m): A001022 (k=0), A015963 (k=-1), A116621 (k=1), A116622 (k=2), A116629 (k=3), A116630 (k=4), A116611 (k=5), A116631 (k=6), A116632 (k=7), A295532 (k=8), A116636 (k=9), A116620(k=10), A116638 (k=11), this sequence (k=12), A321365 (k=14), A116639 (k=15). Cf. A116609, A127821, A128149. Sequence in context: A082256 A324261 A324262 * A116148 A210085 A251521 Adjacent sequences:  A321361 A321362 A321363 * A321365 A321366 A321367 KEYWORD nonn,more AUTHOR Max Alekseyev, Nov 07 2018 STATUS approved

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Last modified January 17 17:47 EST 2022. Contains 350402 sequences. (Running on oeis4.)