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 A295532 Positive integers n such that 13^n == 8 (mod n). 12
 1, 5, 371285, 3957661, 70348567451, 42831939409247 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS No other terms below 10^15. LINKS Table of n, a(n) for n=1..6. MATHEMATICA Join[{1, 5}, Select[Range[4000000], PowerMod[13, #, #] == 8 &]] (* Robert Price, Apr 10 2020 *) CROSSREFS Cf. A116609, A127821, A015922, A277630. Sequences 13^n == k (mod n): A116621 (k=1), A116622 (k=2), A116629 (k=3), A116630 (k=4), A116611 (k=5), A116631 (k=6), A116632 (k=7), this sequence (k=8), A116636 (k=9), A116620 (k=10), A116638 (k=11), A116639 (k=15). Sequence in context: A057679 A123751 A152516 * A240132 A067509 A067502 Adjacent sequences: A295529 A295530 A295531 * A295533 A295534 A295535 KEYWORD nonn,hard,more AUTHOR Max Alekseyev, Nov 23 2017 STATUS approved

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Last modified February 22 16:01 EST 2024. Contains 370256 sequences. (Running on oeis4.)