Well ... if we're going to be using mythical legends ... then you would look to the global stories of The Flood, which is present in many religions ... and according to the Babylonian version, the "hero" was granted eternal life ... so would still be alive today, thousands of years later.
The Bible lies. The longest lived some japanese geezer Sigechio Izumi 1865 - 1985. As gerontologists say the limit of our lives is between 115 - 120 years. Some people are said to have lived longer but those were mistakes in their birth certificates.