191

This number is a prime.

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The smallest prime in a set of four consecutive multidigit primes, i.e., {191, 193, 197, 199}, whose sum of digits, i.e. {11, 13, 17, 19} is another set of four consecutive primes. [Gupta]

Submitted: 2005-05-18 08:24:59;   Last Modified: 2020-06-11 10:33:09.
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