http://stdkmd.com/nrr/repunit/phin10.cgi?p=1807#N180683
http://factordb.com/index.php?id=1100000000797152487
(10^180683-1)*9/(10^643-1)/(10^281-1)

Primality testing Phi(180683,10) [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 3
Running N-1 test using base 7
Running N+1 test using discriminant 17, base 1+sqrt(17)
Calling N-1 BLS with factored part 0.08% and helper 0.00% (0.24% proof)
Phi(180683,10) is Fermat and Lucas PRP! (15375.9139s+0.0153s)

To be completed...