11059...09057 (64-digits)

This number is a prime.

      1105 9201110878 7311112449 1116979311 1861771127 2193113049 6111309057

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The smallest prime formed from the concatenation of n consecutive n-digit Proth primes, i.e., {11059201, 11087873, 11112449, 11169793, 11186177, 11272193, 11304961, 11309057}, (case n=8). [Bajpai]