99999...89999 (100-digits)
This number is a prime.
9999999999 9999999999 9999999999
9999999999 9999999999 9999999999 9999999999 9999999999 9999999999 9999989999
The largest near-repdigit prime less than a googol. [Gupta]
(There is one curio for this number that has not yet been approved by an editor.)
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