LLR:
(49*10^66485-31)/9 is base 3-Strong Fermat PRP! (66486 decimal digits) Time : 78.509 sec.
(49*10^66485-31)/9 is strong-Fermat, Lucas and Frobenius PRP! (P = 7, Q = 3, D = 37) Time : 294.806 sec.

To be completed...