Found with PFGW Version 3.7.5

1740^5987-5987^1740 is 2-PRP! (12.4889s+0.0022s)
1740^5987-5987^1740 is 3-PRP! (12.0539s+0.0021s)
1740^5987-5987^1740 is 5-PRP! (13.6182s+0.0015s)
1740^5987-5987^1740 is 7-PRP! (15.3916s+0.0021s)
1740^5987-5987^1740 is 11-PRP! (15.0682s+0.0022s)

Primality testing 1740^5987-5987^1740 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 7
Running N+1 test using discriminant 13, base 1+sqrt(13)
Calling N-1 BLS with factored part 0.04% and helper 0.02% (0.14% proof)
1740^5987-5987^1740 is Fermat and Lucas PRP! (94.0657s+0.0042s)

To be completed...