Primality testing 518!2+1 [N-1, Brillhart-Lehmer-Selfridge]
 Calling Brillhart-Lehmer-Selfridge with factored part 36.40%
 518!2+1 is prime! (0.047000 seconds) (digits:593)

 Primality testing 33416!2+1 [N-1, Brillhart-Lehmer-Selfridge]
 Calling Brillhart-Lehmer-Selfridge with factored part 34.94%
 33416!2+1 is prime! (4059.188000 seconds) (digits:68333) Steven Harvey p15 12/2002

 Primality testing 37310!2+1 [N-1, Brillhart-Lehmer-Selfridge]
 Calling Brillhart-Lehmer-Selfridge with factored part 34.54%
 37310!2+1 is prime! (8113.457000 seconds) (digits:77189) Steven Harvey p119 01/2003

 Primality testing 52608!2+1 [N-1, Brillhart-Lehmer-Selfridge]
 Calling Brillhart-Lehmer-Selfridge with factored part 33.35%
 52608!2+1 is prime! (12730.0686s+0.2204s) (digits:112762) Ken Davis p104 11/2003

 Primality testing 123998!2+1 [N-1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 62039
 Running N-1 test using base 62081
 Calling Brillhart-Lehmer-Selfridge with factored part 33.54%
 123998!2+1 is prime! (5553.0741s+2.1128s)(digits:288864) Sou Fukui 05/2015

 Primality testing 220502!2+1 [N-1, Brillhart-Lehmer-Selfridge]
 Running N-1 test using base 110261
 Running N-1 test using base 110291
 Calling Brillhart-Lehmer-Selfridge with factored part 33.91%
 220502!2+1 is prime! (16712.3078s+3.6644s) (digits:541239) Sou Fukui 01/2017