Found with PFGW Version 3.6.0

21^29065-20 is 2-PRP! (18.0414s+0.0030s)
21^29065-20 is 3-PRP! (18.1144s+0.0036s)
21^29065-20 is 5-PRP! (18.0734s+0.0045s)
21^29065-20 is 7-PRP! (18.0530s+0.0032s)
21^29065-20 is 11-PRP! (17.9744s+0.0032s)

Primality testing 21^29065-20 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 19
Running N+1 test using discriminant 31, base 18+sqrt(31)
Calling N-1 BLS with factored part 0.39% and helper 0.00% (1.17% proof)
21^29065-20 is Fermat and Lucas PRP! (140.1063s+0.0032s)

To be completed...