https://na.op.gg/summoner/userName=tarzaned5
He has the highest LP in the world by 81. He is 18-2 in his last 20 ranked games. His exact LP is 1609.
This is certainly the highest LP achieved on any ladder in quite some time. According to what I've found apparently Jensen reached over 1700 back in season 3? 1609 is the highest since then.