It s a 76667 plateau-depression rep-unit number:

PFGW Version 1.2.0 for Windows [FFT v23.8]
(23*10^95326+1)/3 is 3-PRP! (455.4071s+0.0046s)
(23*10^95326+1)/3 is 7-PRP! (562.4393s+4.2830s)

Primality testing (23*10^95326+1)/3 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 2
Running N+1 test using discriminant 5, base 1+sqrt(5)
Calling N-1 BLS with factored part 0.00% and helper 0.00% (0.02% proof)
(23*10^95326+1)/3 is Fermat and Lucas PRP! (3417.2703s+0.0070s)

To be completed...