Crate fibonacci_numbers 

fibonacci-numbers

First install the version of this crate corresponding to the Fibonacci number you want to use:

cargo add fibonacci-numbers@139 --rename fib139

Then you can use the VALUE constant to get its value:

assert_eq!(fib139::VALUE, 50095301248058391139327916261);

Constants

VALUE

The 139th Fibonacci number: 50095301248058391139327916261