How many years did you dedicate to this task? 
Chess Mentor lessons record
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I completed 400+ lessons in a month or so. It was a nice refresher course after having been away from the game for several years. I read a pile of chess books before that, some of which were actually instructive.
I'd encourage the OP to have fun with the exercises, as they do teach valuable lessons. The ratings, however, do not correlate to any OTB or online ratings anywhere. They can be ignored, except as a gauge of your own progress through the lessons.
Hello. I have completed over 400 out of the possible 3884 lessons. I wanted to know if there is someone out there that did every single lesson on chess mentor? And if so, who has the highest chess mentor rating in the world?
P.S. The chess mentor has really help me out a lot and I want to accomplish the rarest feat of completing every single lessson from the chess.com's chess mentor program. Good luck to all and rock and roll to victory and fun!