29998999999999999999999

This number is a prime.

299 9899999999 9999999999

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The smallest prime with an additive persistence (defined in the first curio for 199) equal to the smallest composite number. Can you explain why this book doesn't list a prime with persistence one higher? [Gupta]

Submitted: 2002-02-23 12:05:05; Last Modified: 2008-05-11 05:32:16.