Computing Fibonacci Numbers

Unfortunately, we can't even measure this against the matrix exponentiation, because it gives the wrong answer for $F(71)$ and all future values! What's going on here?

Code

Output

True
True
False
False

Unfortunately, we can't even measure this against the matrix exponentiation, because it gives the wrong answer for $F(71)$ and all future values! What's going on here?

Code

Output

True
True
False
False