4250

This number is a composite.

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Catalan(4250) + 1 is the largest known prime of its form. Note that Catalan(n) = (2n)!/(n!(n + 1)!) ... also called Segner numbers. [Broadhurst]

Submitted: 2000-09-17 00:24:45; Last Modified: 2008-01-30 17:28:00.