SPRP in base 79 and 83 For these bases 26 and 25, I found hitherto: (26^5+25^5)/51 (26^13+25^13)/51 (26^823+25^823)/51 (26^4241+25^4241)/51 (26^7757+25^7757)/51 (26^11161+25^11161)/51
To be completed...