Science · Law · 1601–1665

Pierre de Fermat — Age & Birthday

Born: 17 August 1601 · Died: 12 January 1665 · Age at death: 63

How old was Pierre de Fermat when he died?

Pierre de Fermat died aged 63. He was born on 17 August 1601 and died on 12 January 1665.

French lawyer and mathematician who pioneered number theory and probability and left behind the famous Last Theorem

Did you know?He was a lawyer by profession and treated mathematics only as a hobby, often refusing to publish his formal proofs.

Quick facts

  • Date of birth17 August 1601
  • Date of death12 January 1665
  • Age at death63
  • NationalityFrench
  • BirthplaceBeaumont-de-Lomagne, France
  • Occupationmathematician, lawyer, judge

Editor's Take:

Pierre de Fermat was a lawyer who became one of history's great mathematicians in his spare time. He worked as a councillor at the regional court in Toulouse. In letters to other scholars he laid foundations for number theory and analytic geometry, and early ideas of calculus. With Blaise Pascal he helped create probability theory. In the margin of a book he claimed to have a proof that was too large to fit. His "Last Theorem" resisted mathematicians for more than 350 years, until Andrew Wiles proved it in 1994.

Key Milestones

  1. 1631: Toulouse – lawyer
  2. 1636: Analytic geometry – work
  3. 1637: Last Theorem – margin note
  4. 1654: Probability with Pascal

Pierre de Fermat (French:; 17 August 1601 – 12 January 1665) was a French magistrate, polymath, and mathematician credited for early developments that led to infinitesimal calculus, including his technique of adequality.

Text from Wikipedia, licensed under CC BY-SA 4.0

Profile

Pierre de Fermat: The Last Theorem

French mathematician, 1601–1665

Pierre de Fermat was born in Beaumont-de-Lomagne in 1601.

He was a councillor at the parlement of Toulouse.

He corresponded with Blaise Pascal in 1654.

His Last Theorem was proved by Andrew Wiles in 1994.

Career highlights

  1. 1631Toulouse: lawyer
  2. 1636Analytic geometry: work
  3. 1637Last Theorem: margin note
  4. 1654Probability: with Pascal
  5. 1994Proof: by Wiles

Did you know?He wrote that he had a proof too large for the margin.

Age at death
63
Years since death
361

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Questions people ask

Frequently asked questions

When is Pierre de Fermat's birthday?
Pierre de Fermat's birthday is August 17. He was born on August 17, 1601 in Beaumont-de-Lomagne, France.
How old was Pierre de Fermat when he died?
Pierre de Fermat died on January 12, 1665, aged 63.
Who shares a birthday with Pierre de Fermat?
Famous people who share Pierre de Fermat's August 17 birthday include Robert De Niro, Herta Müller, Mae West, V. S. Naipaul and Thierry Henry.

Born on the same day6

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Robert De Nirob. 1943

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Mae West1893–1980

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V. S. Naipaul1932–2018

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Thierry Henryb. 1977

Thierry Henry

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Reviewed by the Who Shares My Birthday editorial team.

Last reviewed: October 2026