Gerontology Research Group
The list including all known and validated supercentenarians who died before 2015 was compiled by the Gerontology Research Group (GRG). Later cases are sourced either from more recent GRG data, from administrative reports, or from press coverage. Most recent cases from 2017 forward have not been verified by an organization specializing in age verification, such as the GRG, because they are only concentrating on cases of individuals aged 113+.