44444...44449 (108-digits)

This number is a prime.

                                   44444444 4444444444 4444444444 4444444444
4444444444 4444444444 4444444444 4444444444 4444444444 4444444444 4444444449

+ The smallest near-repdigit prime greater than a googol containing 4's. [Loungrides]

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