Mine is 89 years old.
https://www.blueprintincome.com/tools/l ... ill-i-live
However, if I gain 100 pounds, start drinking liquor daily, begin smoking 2 packs of cigarettes a day, quit my job and go on the dole, and become sedentary, I can get it down to 72. It doesn't appear I can realistically get it much lower.
edit - added poll