Found with PFGW Version 3.6.0

4213^6492-6492^4213 is 2-PRP! (22.9403s+0.0025s)
4213^6492-6492^4213 is 3-PRP! (22.9336s+0.0022s)
4213^6492-6492^4213 is 5-PRP! (22.9822s+0.0024s)
4213^6492-6492^4213 is 7-PRP! (22.9538s+0.0024s)
4213^6492-6492^4213 is 11-PRP! (22.9617s+0.0020s)

Primality testing 4213^6492-6492^4213 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 7
Running N-1 test using base 23
Running N+1 test using discriminant 43, base 1+sqrt(43)
Calling N-1 BLS with factored part 0.03% and helper 0.00% (0.09% proof)
4213^6492-6492^4213 is Fermat and Lucas PRP! (131.9124s+0.0040s)

To be completed...