Let Fn=22n+1F_n = 2^{2^n} + 1Fn=22n+1. What is gcd(Fn,Fm)\text{gcd}(F_n, F_m)gcd(Fn,Fm) for n<mn < mn<m?
1
2
22n+12^{2^n}+122n+1
Fm−2F_m-2Fm−2