A supercentenarian is someone who has lived to the age of 110 years or more, something achieved by only one in a thousand centenarians. A very small number of supercentenarians have lived to be 115. Early uses of the word meant a person well over 100, but now it is just known as people who are 110 or older.
Jeanne Calment who died in 1997 was a French lady who lived to the age of 122. She is the oldest person ever whose age we can be sure about. She remembered meeting the painter Vincent van Gogh (1853–1890).