269

This number is a prime.

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The smallest odd prime number formed from the initial digits in the decimal expansion of sum of alternating series of reciprocals of primes, i.e., 1/2 - 1/3 + 1/5 - 1/7 + 1/11 - ... = 0.269... . [Beedassy]

Submitted: 2009-11-10 13:44:55; Last Modified: 2025-04-02 03:39:27.