93917775575551

This number is a prime.

                                                             9391 7775575551

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The largest prime formed by concatenating in descending order n successive terms in the sequence of double-digit odd-digit composite numbers, (case n=7). [Loungrides]

Submitted: 2016-08-23 06:39:41;   Last Modified: 2020-07-13 15:15:43.
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