Found with PFGW Version 3.7.5

807^9866-9866^807 is 2-PRP! (15.0570s+0.0011s)
807^9866-9866^807 is 3-PRP! (15.0505s+0.0012s)
807^9866-9866^807 is 5-PRP! (15.0285s+0.0011s)
807^9866-9866^807 is 7-PRP! (15.0047s+0.0011s)
807^9866-9866^807 is 11-PRP! (15.0219s+0.0011s)

Primality testing 807^9866-9866^807 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 5
Running N-1 test using base 7
Running N+1 test using discriminant 13, base 10+sqrt(13)
Calling N-1 BLS with factored part 0.08% and helper 0.06% (0.29% proof)
807^9866-9866^807 is Fermat and Lucas PRP! (90.4238s+0.0023s)

To be completed...