Found with PFGW Version 3.7.5

764^5281-5281^764 is 2-PRP! (8.0149s+0.0019s)
764^5281-5281^764 is 3-PRP! (7.8403s+0.0023s)
764^5281-5281^764 is 5-PRP! (7.9880s+0.0021s)
764^5281-5281^764 is 7-PRP! (9.0962s+0.0029s)
764^5281-5281^764 is 11-PRP! (9.3133s+0.0019s)

Primality testing 764^5281-5281^764 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 3
Running N-1 test using base 5
Running N+1 test using discriminant 11, base 2+sqrt(11)
Calling N-1 BLS with factored part 0.06% and helper 0.02% (0.20% proof)
764^5281-5281^764 is Fermat and Lucas PRP! (51.7801s+0.0034s)

To be completed...