66666...66641 (43-digits)

This number is a prime.

                             666 6666666666 6666666666 6666666666 6666666641

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The largest prime less than a googol of the form 666...666dd, where the last digits are the number of 6's. [Loungrides]

Submitted: 2009-01-11 11:48:36;   Last Modified: 2009-01-12 16:44:16.
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