Yeah 84,500 at lv50. Pre 50, they would go up every level you got to reflect the amount of exp needed till next level(15%). But it seems like they forgot to do the 15% thing for 51-60 as every level seems to be getting the 15% of exp required to go from 49-50. I hope they look at this soon cause the challenge log becomes quite insignificant post 50 otherwise.