Found with PFGW Version 3.6.0

1607^4352-4352^1607 is 2-PRP! (9.2407s+0.0019s)
1607^4352-4352^1607 is 3-PRP! (9.4594s+0.0019s)
1607^4352-4352^1607 is 5-PRP! (9.6023s+0.0033s)
1607^4352-4352^1607 is 7-PRP! (9.5008s+0.0028s)
1607^4352-4352^1607 is 11-PRP! (9.4758s+0.0019s)

Primality testing 1607^4352-4352^1607 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 3
Running N+1 test using discriminant 7, base 1+sqrt(7)
Calling N+1 BLS with factored part 0.06% and helper 0.05% (0.25% proof)
1607^4352-4352^1607 is Fermat and Lucas PRP! (44.9082s+0.0017s)

To be completed...