also (1809^1810)^16+(1810^1809)^16
PRP PFGW b=3,7
Generalized Leyland prime
The smallest 2^4^3+3^4^2 = 3^2^4+4^2^3 = 10657 = 8^4+9^4 =(2^3)^4+(3^2)^4 = (3^4)^2+(4^3)^2
See also https://pzktupel.de/Primetables/TableLeyland1.php

To be completed...