191

This number is a prime.

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191 is the smallest prime such that the sum of the reciprocals of the primes less than or equal to it begins with the digits of the next prime. Thus, 1/2 + ... + 1/191 = 1.9337.... [Rupinski]

Submitted: 2002-09-13 21:56:10; Last Modified: 2008-01-30 17:28:00.