6

This number is a composite.

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Was Robert Breusch the first to prove that there exists at least one prime of the form 4k + 1 and at least one prime of the form 4k + 3 between n and 2n for all n greater than 6? See Mathematische Zeitschrift.

Submitted: 1999-09-02 23:40:00; Last Modified: 2019-05-17 00:16:30.