Fibonacci number

PFGW Version 20090928.Win_Dev (Beta caveat utilitor ) [GWNUM 25.13]

Primality testing F(1968721) [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 19
Running N+1 test using discriminant 37, base 12+sqrt(37)
F(1968721) is Fermat and Lucas PRP! (99410.6432s+0.1604s)

To be completed...