533...33 near-rep-units
3,5,7-PRP, N+-1/BLS

Primality testing (16*10^13993-1)/3 [N-1/N+1, Brillhart-Lehmer-Selfridge]...
(16*10^13993-1)/3 is Fermat and Lucas PRP! (48.4450s+0.0003s)

Primality testing (16*10^35753-1)/3 [N-1/N+1, Brillhart-Lehmer-Selfridge]...
Calling N+1 BLS with factored part 0.03% and helper 0.01% (0.11% proof)
(16*10^35753-1)/3 is Fermat and Lucas PRP! (795.7401s+0.0374s)

Primality testing (16*10^40889-1)/3 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 2
Running N+1 test using discriminant 5, base 5+sqrt(5)
Running N+1 test using discriminant 5, base 10+sqrt(5)
Running N+1 test using discriminant 5, base 15+sqrt(5)
Calling N+1 BLS with factored part 0.02% and helper 0.01% (0.06% proof)
(16*10^40889-1)/3 is Fermat and Lucas PRP! (2641.4821s+0.0050s)

To be completed...