19

This number is a prime.

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There are 19 visible diamond patterns on the surface of a fully formed rhombic triacontahedron when structured using a series of phi-ratio pyramids. An example being Roger von Oech's Ball of Whacks. [Trace]

Submitted: 2010-01-08 10:33:05;   Last Modified: 2012-02-29 16:50:42.
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