Found with PFGW Version 3.6.0

761^4020-4020^761 is 2-PRP! (6.2051s+0.0018s)
761^4020-4020^761 is 3-PRP! (6.2622s+0.0032s)
761^4020-4020^761 is 5-PRP! (6.2317s+0.0032s)
761^4020-4020^761 is 7-PRP! (6.2226s+0.0017s)
761^4020-4020^761 is 11-PRP! (6.1922s+0.0017s)

Primality testing 761^4020-4020^761 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 11
Running N+1 test using discriminant 17, base 2+sqrt(17)
Calling N-1 BLS with factored part 0.09% and helper 0.07% (0.33% proof)
761^4020-4020^761 is Fermat and Lucas PRP! (31.8981s+0.0018s)

To be completed...