12233...33221 (25-digits)

This number is a prime.

                                                 12233 3444455555 4444333221

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A palindromic prime formed from the first five digits, where each digit d is repeated d times in ascending and descending order. [Silva]

Submitted: 2004-10-28 06:30:32;   Last Modified: 2009-03-04 19:47:20.
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