The longest unambiguously ocumented lifespan is that of Jeanne Calment of France (1875–1997), who was aged 122 years and 164 days. She met Vincent van Gogh at age 14. This led to her being noticed by the media in 1988, at age 113. Subsequent investigation found that her life was documented in the records of her native city of Arles beyond reasonable question. More evidence for the Calment case has been produced than for any other supercentenarian case, which makes her case a gold standard among the oldest people recordholders. This is contrasted with the now-disputed claim of age 120 for the oldest man ever, Shigechiyo Izumi. While this case is currently still recognized by Guinness World Records, the Japanese authorities have hinted that his age was not certain. This claim was accepted in 1978, but subsequent additional research (as early as 1984) has raised doubt as to whether his birth date was confused with that of a brother who died at a young age.