I normally do the 3 Mill of individual PP in two days, note that that's on work days since it normally takes 3 hours to reach 2 millions, if I dedicated a whole day to farm PP I could probably hit 5 million and then stomp on too though (level 200+) raids to solo, that being said I'm by far an average player, certainly not the stronger, imagine if someone stronger than me in a better Union (I'm in my current Union because I have friends there, not because we're tops or anything) would dedicate a whole event to non-stop farm PP, he could probably hit 30 Million.