23787...13481 (26-digits)

This number is a prime.

                                                237874 1380049115 0079713481

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The number of dissections of a convex 20-gon by nonintersecting diagonals into an odd number of regions. It is the largest known prime of this form. [Post]

Submitted: 2004-11-12 21:47:06;   Last Modified: 2008-02-14 01:34:31.
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