55, and 10 respectively.
Was going to mention this but you beat me to it :D
Anywho I'm kind of glad it's at 55 and not something like 90 or 100.
OH YEAH, that reminds me: the Multiplayer system isn't going to be like this: Select game > connects you to best available game with random people.
It will be like this: Select game > connects you to the best available game
with people around your skill level, thus meaning you won't be pinned up against a team of 10th prestigers when you're a completely different level and aren't as good as they are.
Another note, this doesn't mean that if you're a 2nd prestige you'll be in a game full of 2nd prestigers. This means you will be in a game full of people that have around the same K/D that you have, the same W/L that you have, etc.