1.347069552...

This number is neither prime nor composite.

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The sum of the reciprocals of the twin primes separated by non-squarefree numbers: (1/3 + 1/5) + (1/11 + 1/13) + (1/17 + 1/19) + (1/59 + 1/61) + ... . [Xavier]

Submitted: 2016-07-05 21:49:07; Last Modified: 2016-07-05 21:52:30.