29998...10009 (32-digits)

This number is a prime.

29 9988877766 6555444333 2221110009

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The only prime formed by inserting in descending order thrice each digit d between the digits of a double-digit prime p, (case p=29). [Loungrides]

Submitted: 2019-03-23 18:54:32; Last Modified: 2019-03-23 23:16:37.