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What will be the longest verified human lifespan on record on January 1 2050?
As of 2018, the record for longest verified human lifespan is held by Jeanne Louise Calment of Arles, France. She lived from 21 February 1875 to 4 August 1997, for a term of 122 years, 164 days.
She has held the record for longest confirmed human lifespan since 12 May 1990, was the first human ever to have been confirmed to have lived to the age of 116 years, and is the only human confirmed to have ever lived beyond 120 years. Calment reportedly remained mentally intact until the end of her life, and the New York Times reported that she had been in good health, though almost blind and deaf, as recently as a month before her death. She died of unspecified causes.
The oldest verified person currently alive, as of 8 December 2018, is Kane Tanaka of Japan. She was born on 2 January 1903 and at time of question writing is 115 years, 338 days old. If she is still alive on January 1 2050, she will be 146 years, 11 months, 30 days old.
As of January 1 2050, what will be the longest verified human lifespan on record, in years?
To avoid ambiguity in the event that someone is unconscious (perhaps for a long time) before their death, this question shall focus on age at legal death. If a person is declared legally dead by competent authorities, their age at the time their legal death takes effect shall be considered their age at death, even in the event that their physical body may still exist and certain biological functions may be maintained by extraordinary means. In case a person successfully emerges from cryopreservation between now and 2050, all time spent legally dead before and during cryopreservation shall be deducted from their lifespan.
I have selected a maximum age possibility of 200, substantially above the maximum possible if Ms Tanaka lives to 2050, to account for the possibility that there are substantially older persons currently alive but unknown to gerontologists, or people with unverified claims whose claims subsequently become verified.
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