Found with PFGW Version 3.7.5

449^10638-10638^449 is 2-PRP! (14.8530s+0.0014s)
449^10638-10638^449 is 3-PRP! (15.2033s+0.0014s)
449^10638-10638^449 is 5-PRP! (14.8530s+0.0013s)
449^10638-10638^449 is 7-PRP! (16.9290s+0.0015s)
449^10638-10638^449 is 11-PRP! (18.1484s+0.0015s)

Primality testing 449^10638-10638^449 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 5
Running N+1 test using discriminant 11, base 1+sqrt(11)
Calling N-1 BLS with factored part 0.08% and helper 0.04% (0.27% proof)
449^10638-10638^449 is Fermat and Lucas PRP! (74.4845s+0.0021s)

To be completed...