20988...63921 (44-digits)

This number is a prime.

2098 8936657440 5864861512 6425661022 2593863921

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Ferrier used a mechanical desk calculator to find this prime in 1951, making it the largest prime found before electronic computers.

Submitted: 1999-09-02 23:40:00; Last Modified: 2009-05-09 02:34:10.