Primality testing (13566^12601-1)/13565 [N-1, Brillhart-Lehmer-Selfridge]                                    
Running N-1 test using base 2                                    
Running N-1 test using base 3                                    
Running N-1 test using base 7                                    
Running N-1 test using base 11                                    
Running N-1 test using base 19                                    
Calling Brillhart-Lehmer-Selfridge with factored part 25.72%                                    
(13566^12601-1)/13565 is PRP! (179.9826s+0.0007s)