31415...51413 (53-digits)

This number is a prime.

314 1592653589 7932384626 4338334626 4832397985 3562951413

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A palindromic prime formed from the reflected decimal expansion of π. Found by G. L. Honaker, Jr. in 1999.

Submitted: 1999-09-02 23:40:00; Last Modified: 2026-04-04 20:55:12.