Found with PFGW Version 3.7.5

136^20710-135 is 2-PRP! (12.7268s+0.0012s)
136^20710-135 is 3-PRP! (12.7176s+0.0011s)
136^20710-135 is 5-PRP! (12.7345s+0.0012s)
136^20710-135 is 7-PRP! (12.7085s+0.0011s)
136^20710-135 is 11-PRP! (12.8835s+0.0012s)

Primality testing 136^20710-135 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 19
Running N+1 test using discriminant 29, base 10+sqrt(29)
Calling N-1 BLS with factored part 0.14% and helper 0.00% (0.41% proof)
136^20710-135 is Fermat and Lucas PRP! (92.7515s+0.0018s)

To be completed...