Found with PFGW Version 3.5.2

75^12641-74 is 2-PRP! (18.4700s+0.0060s)
75^12641-74 is 3-PRP! (24.4868s+0.0023s)
75^12641-74 is 5-PRP! (37.7220s+0.0024s)
75^12641-74 is 7-PRP! (29.2822s+0.0024s)
75^12641-74 is 11-PRP! (38.8742s+0.0024s)

Primality testing 75^12641-74 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 7
Running N-1 test using base 13
Running N+1 test using discriminant 31, base 17+sqrt(31)
Calling N-1 BLS with factored part 0.45% and helper 0.00% (1.36% proof)
75^12641-74 is Fermat and Lucas PRP! (161.1139s+0.0243s)

To be completed...