844...441 quasi-rep-unit.
Primality testing (76*10^35427-31)/9 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 3
Running N+1 test using discriminant 7, base 1+sqrt(7)
Calling N-1 BLS with factored part 0.02% and helper 0.01% (0.07% proof)
(76*10^35427-31)/9 is Fermat and Lucas PRP! (281.1930s+0.0013s)

To be completed...