Three hexagons defining 28 different points (13 vertices plus 15 'middle' points, for 9 prime -green- and 19 non prime numbers -red-) [Trois hexagones définissant 28 points différents (13 sommets plus 15 milieux, pour 9 nombres premiers -verts- et 19 nombres non premiers -rouges-)].

The 9 green points display the locations of the prime numbers, when the 19 red ones display those of the non prime numbers.

See a related mysterious problem:

(CMAP28 WWW site: this page was created on 02/26/2018 and last updated on 02/26/2018 12:17:23 -CET-)

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Copyright (c) Jean-François Colonna, 2018.
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