Anybody 20th prestige on cod4 remastered?

[Kerotan]

FIT_Gamer said:
I'm only level 55 on COD 4, haven't prestiged, likely won't.

That being said, they did the same thing for BO 3. I have like 20 days play time on that game and am only level 510.

I've 11 days on cod4 but I'm prestige 11. 

So how do the higher levels work?  When you hit 55 does all levels from 56-1000 take the same amount of xp as level 55? Or does it rotate like it's a new prestige?