22222...22221 (100-digits)

This number is a prime.

                                            2222222222 2222222222 2222222222
2222222222 2222222222 2222222222 2222222222 2222222222 2222222222 2222222221

+ The smallest 100-digit near-repdigit (other than near-repunit) prime. [Wesolowski]

(There are 2 curios for this number that have not yet been approved by an editor.)

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