The oldest person I knew personally was either 104 or 105 when she died. She didn't get around as well, but she lived alone (her husband died when she was in her 60s or 70s) and took care of herself. Her mind was just as active as could be the last time we saw her (when she was 100). When I say she didn't get around as well, don't get me wrong--she still got around! At 100 she still walked a couple blocks to the beauty parlor to have her hair done.