0.555091030...

This number is neither prime nor composite.

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The sum of the reciprocals of the twin primes separated by squarefree numbers: (1/5 + 1/7) + (1/29 + 1/31) + (1/41 + 1/43) + (1/101 + 1/103) + ... . [Xavier]

Submitted: 2016-07-08 02:53:26; Last Modified: 2020-06-18 15:31:13.