>>535646576
That is the absolute theoretical maximum, but realistically, it shouldn't happen. Getting a doll at exactly the 80th pull is a 1 in 12 million chance due to the way the gacha works.
>>532465669
It is how probability works. By max, anon meant 99th percentile. Theoretically, the max for any copy of a T-Doll is 160, but the chance of that happening are so low, that it is the same odds as winning the lottery.