946489

This number is a prime.

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The largest composite-digit prime, with the least length, consisting of all the composite digits, whose the single-digit prime factors concatenated left-to-right, form another prime, i.e., 3322232222233. [Loungrides]

Submitted: 2015-05-30 15:10:20;   Last Modified: 2020-09-29 13:39:44.
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