Primality testing Phi(2161,64283) [N-1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 23
Running N-1 test using base 29
Calling Brillhart-Lehmer-Selfridge with factored part 28.06%
Phi(2161,64283) is PRP! (1556.0069s+0.0072s)