99999999999999999991999

This number is a prime.

999 9999999999 9999991999

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The smallest near-repdigit prime whose sum of digits is a near-repdigit prime substring (199). Note that the latter is the smallest near-repdigit prime whose sum of digits is a prime substring (19). [Beedassy]

Submitted: 2009-12-14 02:08:03; Last Modified: 2009-12-14 21:38:16.