13579...97531 (28-digits)

This number is a prime.

                                              13579111 3151719171 5131197531

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A prime formed from the concatenation in ascending order of the odd numbers 1 through 19 and continuing from 19 in descending order up to 1. Can you find a larger prime of this form? [Loungrides]

Submitted: 2020-05-08 04:24:00;   Last Modified: 2020-05-08 07:51:03.
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