19999...99999 (2907-digits)

This number is a prime.

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The number 2*10^2906-1, written as one 1 followed by 2906 9s, is another 'near-repdigit' prime number. It was found to be prime in 1985 by Hugh C. Williams. [Dobb]

Submitted: 2002-04-13 18:57:10; Last Modified: 2008-01-30 17:28:00.