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:
, 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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