113

This number is a prime.

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Zu Chongzhi (or Tsu Ch'ung Chi), along with his son Zu Gengzhi, stated in a mathematical text titled Zhui Shu (Method of Interpolation) that π is approximately three hundred fifty-five divided by 113.

Submitted: 1999-09-02 23:40:00; Last Modified: 2008-12-25 05:38:23.