99999...99991 (199-digits)

This number is a prime.

            999999999 9999999999 9999999999 9999999999 9999999999 9999999999
9999999999 9999999999 9999999999 9999999999 9999999999 9999999999 9999999999
9999999999 9999999999 9999999999 9999999999 9999999999 9999999999 9999999991

+ The smallest prime starting with 99 occurrences of "99" is the near-repdigit prime 10^199-9 = 9...91, which is also the largest prime with 199 digits. [Hasler]

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