Found with PFGW Version 3.6.0

71^19719-70 is 2-PRP! (20.5062s+0.0030s)
71^19719-70 is 3-PRP! (20.5420s+0.0030s)
71^19719-70 is 5-PRP! (20.5075s+0.0030s)
71^19719-70 is 7-PRP! (20.5347s+0.0026s)
71^19719-70 is 11-PRP! (20.4338s+0.0041s)

Primality testing 71^19719-70 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 31
Running N-1 test using base 37
Running N+1 test using discriminant 47, base 4+sqrt(47)
Calling N-1 BLS with factored part 0.03% and helper 0.01% (0.10% proof)
71^19719-70 is Fermat and Lucas PRP! (168.6594s+0.0027s)

To be completed...