I can't recall the name off hand, but there was a French woman who live to be 122 years young. At least she is the oldest person to have ever lived and had proper credentals to back it up, officially. Who really knows how long a human can live for?
EDIT: I googled it and the name of the oldest person on record is Jeanne Calment. Here's her page on Wikipedia, if that helps.
http://en.wikipedia.org/wiki/Jeanne_Calment