Pisano Periods 2 (noch nicht übersetzt)
Problem 854
For every positive integer n the Fibonacci sequence modulo n is periodic. The period depends on the value of n. This period is called the Pisano period for n, often shortened to π(n).
Define M(p) as the largest integer n such that π(n)=p, and define M(p)=1 if there is no such n.
For example, there are three values of n for which π(n) equals 18: 19,38,76. Therefore M(18)=76.
Let the product function P(n) be: P(n)=n∏p=1M(p). You are given: P(10)=264.
Find P(1000000)mod1234567891.