66666...99999 (30-digits)

This number is a prime.

                                            6666667777 7778888888 8999999999

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The only prime formed from four consecutive digits d with repeating each digit d times. [Loungrides]

Submitted: 2009-02-11 08:34:29;   Last Modified: 2014-11-02 15:59:41.
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