Found with PFGW Version 3.4.8

48^12137-47 is 2-PRP! (12.8225s+0.0042s)
48^12137-47 is 3-PRP! (14.0253s+0.0006s)
48^12137-47 is 5-PRP! (21.0605s+0.0006s)
48^12137-47 is 7-PRP! (25.0181s+0.0006s)
48^12137-47 is 11-PRP! (27.4335s+0.0006s)

Primality testing 48^12137-47 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 11
Running N-1 test using base 13
Running N-1 test using base 17
Running N+1 test using discriminant 23, base 1+sqrt(23)
Calling N-1 BLS with factored part 0.20% and helper 0.04% (0.63% proof)
48^12137-47 is Fermat and Lucas PRP! (238.8916s+0.0041s)

To be completed...