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Voronoi Diagrams of the Ulam Prime Spiral
The table below shows the first prime with an n-gonal voronoi cell, for n from 3 to 10. There were no
11-gonal voronoi cells for any prime less than 10000. If you aren't sure what all this means, check out the explanation on the main page on this topic.
p | "Centre" | #Vertices | Vertex List | Area | Perimeter |
2 | (1,0) | 5 | ( | 3 2
| , | 1 2
| ) | , | ( | 3 2
| , | - | 3 2
| ) | , | ( | 1 6
| , | - | 5 6
| ) | , | ( | - | 1 4
| , | 0 | ) | , | ( | 0 | , | 1 2
| ) |
| | |
5 | (-1,1) | 6 | ( | - | 2 | , | 1 | ) | , | ( | - | 1 | , | 0 | ) | , | ( | - | 1 4
| , | 0 | ) | , | ( | 0 | , | 1 2
| ) | , | ( | 0 | , | 7 3
| ) | , | ( | - | 1 2
| , | 5 2
| ) |
| | |
23 | (0,-2) | 4 | ( | 1 6
| , | - | 5 6
| ) | , | ( | - | 3 2
| , | - | 5 2
| ) | , | ( | - | 1 | , | - | 4 | ) | , | ( | 3 2
| , | - | 3 2
| ) |
| | |
61 | (0,4) | 7 | ( | 0 | , | 5 | ) | , | ( | - | 3 2
| , | 7 2
| ) | , | ( | - | 1 2
| , | 5 2
| ) | , | ( | 0 | , | 7 3
| ) | , | ( | 1 2
| , | 5 2
| ) | , | ( | 1 | , | 3 | ) | , | ( | 1 | , | 5 | ) |
| | |
67 | (-4,2) | 8 | ( | - | 5 | , | 2 | ) | , | ( | - | 5 | , | 1 | ) | , | ( | - | 9 2
| , | 1 2
| ) | , | ( | - | 4 | , | 1 3
| ) | , | ( | - | 7 2
| , | 1 2
| ) | , | ( | - | 3 | , | 1 | ) | , | ( | - | 3 | , | 2 | ) | , | ( | - | 4 | , | 3 | ) |
| | |
313 | (3,9) | 3 | | | |
2837 | (27,1) | 9 | ( | 28 | , | - | 1 | ) | , | ( | 26 | , | - | 1 | ) | , | ( | 74 3
| , | - | 1 3
| ) | , | ( | 122 5
| , | 1 | ) | , | ( | 49 2
| , | 3 2
| ) | , | ( | 53 2
| , | 7 2
| ) | , | ( | 28 | , | 19 5
| ) | , | ( | 321 11
| , | 34 11
| ) | , | ( | 117 4
| , | 11 4
| ) |
| | | 2 | + | 2 | �2 | + | 2 3
| �5 | + | 5 4
| �10 | + | 97 132
| �26 | + | 13 55
| �34 |
|
8741 | (47,45) | 10 | ( | 46 | , | 44 | ) | , | ( | 46 | , | 47 | ) | , | ( | 526 11
| , | 527 11
| ) | , | ( | 97 2
| , | 95 2
| ) | , | ( | 99 2
| , | 93 2
| ) | , | ( | 405 8
| , | 357 8
| ) | , | ( | 862 17
| , | 749 17
| ) | , | ( | 50 | , | 43 | ) | , | ( | 48 | , | 43 | ) | , | ( | 93 2
| , | 87 2
| ) |
| | | 5 | + | 259 136
| �2 | + | 10 11
| �5 | + | 1 2
| �10 | + | 6 17
| �13 | + | 45 88
| �34 |
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