29999...99999 (911-digits)

This number is a probable-prime (likely to be a prime but we have not (re-)proven it on this site).

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The smallest prime whose sum of digits is 8191, the fifth Mersenne prime. [Gupta]

Submitted: 2019-02-17 10:10:22; Last Modified: 2019-02-17 15:30:06.