Problem 56220. Easy Sequences 75: Easy as Pisano Pi

Ramon Villamangca

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Pisano period , of an integer n, is the period in which the sequence of Fibonacci numbers modulo n repeats. For example it is not hard to show that ,  and  are 3, 8 and 6, respectively:
            
I have used Pisano period in the solutions of Problem 56050. Easy Sequences 73: Emergence of Fibonacci Insects and Problem 56065. Easy Sequences 74: Fibonacci Bank Account.
In this problem, we are asked to simply output the Pisano period of given integer n.

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Last Solution submitted on May 24, 2026

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