Near-repdigit (222..221) (2*10^282948-11)/9 is base 3-Fermat PRP! (282948 decimal digits) Time : 225.120 sec. (2*10^282948-11)/9 is Fermat, Lucas and Frobenius PRP! (P = 4, Q = 2, D = 8) Time : 989.330 sec.
To be completed...