PRP in base 79 and 83

For base 55, I found hitherto:
(55^3+1)/56
(55^5+1)/56
(55^179+1)/56
(55^229+1)/56
(55^1129+1)/56
(55^1321+1)/56
(55^2251+1)/56
(55^15061+1)/56

To be completed...