I know (really extendeted)relatives that are 110+ year old. Also my parents knew of this guy, who died when he was ~125. Apparently because he was alive when my great-great-great grand-parents (who my grandparents knew)were alive, and my parents knew him.
If you can prove that, he would be the oldest known person to have ever lived
https://en.wikipedia.org/wiki/Oldest_people
Anyway, for me, it is 80 right now (at least in terms of close relatives).
I have no idea who he is.
My Parents barely now who he is.
And there is no birth certificate or death certificate for that matter
And I doubt he's ever been on government rolls for any reason.
I don't even know if it's true.