Has any famous/infamous person ever died on their 100th birthday?
If you are 65, your chances of living to 100 are approx 4.4% or 1 in 25. so the probability of dying on your 100th birthday, is at least 25x365x? with ?=the average number of days that anybody who gets to 100 lives to. So if the average age of all people making 100 is 101.5. say 550 days or 550/1. Them my amateur maths says the poss of any body who is now 65 dying on their 100th birthday is
25x365x550 or over 5 million to 1.
But I stand to be corrected