29998...10009 (32-digits)

This number is a prime.

                                         29 9988877766 6555444333 2221110009

Just showing those entries submitted by 'Loungrides': (Click here to show all)

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]