number of digits
 

pg(215), pg(69660), pg(92020) and pg(541456) are prp with 215, 69660, 92020, 541456 multiple of 43


pg(215) has 130 digits
pg(69660) has 41940 digits
pg(92020) has 55402 digits
pg(541456) has 325990 digits


so when pg(k) is prp and k multiple of 43


pg(k) has a number of digits multiple of 3 only if k is a multiple of 3.

[QUOTE=enzocreti;535203]pg(k) has a number of digits multiple of 3 only if k is a multiple of 3.[/QUOTE]
Nonsense.

How many digits pg(4) has?