We study the Fibonacci sequence mod for some positive integer . Such a sequence is necessarily periodic; we introduce a function which gives the ratio of the length of this period to itself. We compute in certain cases and provide bounds for it which depend on the nature of the prime divisors of .
"Bounds for Fibonacci period growth." Involve 2 (2) 195 - 210, 2009. https://doi.org/10.2140/involve.2009.2.195