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 16:33:05;   Last Modified: 2023-09-17 13:25:33.
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