This number is a prime.

                                                         77777772 2155555333

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The largest prime with each noncomposite digit d repeated d times. Note that replacing digit 1 by 5 forms the largest prime (777777722555555333) with each prime digit d' repeated a number of times closest to and at least equal to d'. [Beedassy]

Submitted: 2010-01-09 07:45:03;   Last Modified: 2010-01-09 07:54:08.
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