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[[[> IMG:Eratosthenes.jpeg ]]]
Eratosthenes of Cyrene (276 BCE - 194 BCE) was a Greek mathematician
(among other things), and was chief librarian of the Great Library of
Eratosthenes of Cyrene (276 BCE - 194 BCE), a Greek mathematician
(among other things), was chief librarian of the Great Library of
Alexandria. He also devised a system of latitude and longitude, and
was the first known person to have calculated the circumference of the Earth.

He also invented a method of finding Prime Numbers that doesn't require
He also invented a method of finding Prime Numbers, called the Sieve Of Eratosthenes, that doesn't require
division (although most people implement this incorrectly and do use division.)

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One of the Famous People on this site.