First cousin twice removed Mildred Lewis lived to 102. People who knew her told me she retained all her marbles and good health up until about 6 months before she passed. I once visited her church where her parents and my great-grandparents were founding members. When they celebrated their 100th anniversary, members made a timeline which was hanging on the wall. The first event was "1904 Mildred Lewis born". She was 5 when the church was founded, and if I am remembering correctly, playing downstairs while the adults met. She lived her whole life in the same town attending that church and was much loved and remembered very fondly by the congregation. She never married or had children, but became very close to a family who rented an apartment in her home whom she adopted in spirit. I remember visiting cousin Mildred's house when I was young. My family lost touch with her some time after my great-aunt (her 1st cousin) passed away. There were many times I thought to contact her, after I heard she was still alive and "sharp as a tack", but never did. :(
I have a living first cousin twice removed (my grandmother's first cousin) born Nov 1916. Still mentally with it and healthy aside from having lost most of her hearing and the usual things people her age tend to have issues with. Her younger sister is also still living and close to hitting the century mark herself. They had an older brother who died young at age 80.
My grandmother (1st cousin to the siblings mentioned in the previous paragraph) lived to 97. She could barely walk due to arthritis and didn't see well, but also remained mentally sharp to the very end. She outlived her husband, one daughter, and a grandson.