This number is a prime.

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The chromatic number of a stage-8 Menger sponge (the unit cube is stage-0). The chromatic number is the minimum number of colors necessary to color any map drawn on that surface so that no regions sharing a common border receive the same color. [Post]

Submitted: 2007-12-06 17:24:07;   Last Modified: 2018-12-22 15:11:11.
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