Found with PFGW Version 3.6.0

1609^4710-4710^1609 is 2-PRP! (10.4854s+0.0021s)
1609^4710-4710^1609 is 3-PRP! (10.3941s+0.0020s)
1609^4710-4710^1609 is 5-PRP! (10.3500s+0.0019s)
1609^4710-4710^1609 is 7-PRP! (10.6387s+0.0019s)
1609^4710-4710^1609 is 11-PRP! (10.6276s+0.0024s)

Primality testing 1609^4710-4710^1609 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 11
Running N+1 test using discriminant 17, base 6+sqrt(17)
Calling N+1 BLS with factored part 0.03% and helper 0.03% (0.14% proof)
1609^4710-4710^1609 is Fermat and Lucas PRP! (49.3900s+0.0033s)

To be completed...