Voronoi Diagrams of the Ulam Prime Spiral


The table below shows information about the Voronoi Cells of the Ulam Prime Spiral, for all primes less than 100. If you aren't sure what that means, check out the explanation on the main page on this topic.

p"Centre"#VerticesVertex ListAreaPerimeter
2(1,0)5
(3

2
,1

2
)(3

2
,-3

2
)(1

6
,-5

6
)(-1

4
,0)(0,1

2
)
61

24
7

2
+4

3
5
3(1,1)5
(0,1

2
)(3

2
,1

2
)(2,1)(1

2
,5

2
)(0,7

3
)
65

24
10

3
+22+1

6
10
5(-1,1)6
(-2,1)(-1,0)(-1

4
,0)(0,1

2
)(0,7

3
)(-1

2
,5

2
)
157

48
31

12
+5

2
2+1

4
5+1

6
10
7(-1,-1)6
(-2,-1)(-2,-2)(-3

2
,-5

2
)(1

6
,-5

6
)(-1

4
,0)(-1,0)
155

48
7

4
+19

6
2+5

12
5
11(2,0)5
(3

2
,1

2
)(3

2
,-3

2
)(3,-2)(3,0)(2,1)
7

2
4+3

2
2+1

2
10
13(2,2)5
(2,1)(1

2
,5

2
)(1,3)(2,3)(3,2)
11

4
1+42
17(-2,2)5
(-3,2)(-3,1)(-2,1)(-1

2
,5

2
)(-3

2
,7

2
)
7

2
2+42
19(-2,0)5
(-2,-1)(-7

2
,1

2
)(-3,1)(-2,1)(-1,0)
11

4
1+42
23(0,-2)4
(1

6
,-5

6
)(-3

2
,-5

2
)(-1,-4)(3

2
,-3

2
)
25

6
25

6
2+2

3
5+1

2
10
29(3,1)5
(2,1)(3,0)(9

2
,3

2
)(4,2)(3,2)
11

4
1+42
31(3,3)4
(2,3)(3,2)(4,2)(4,5)
7

2
4+32
37(-3,3)5
(-4,3)(-4,4)(-3,5)(-3

2
,7

2
)(-3,2)
17

4
1+52
41(-3,-1)6
(-4,-1)(-4,1

3
)(-7

2
,1

2
)(-2,-1)(-2,-2)(-3,-2)
10

3
10

3
+5

2
2+1

6
10
43(-3,-3)6
(-4,-3)(-3,-4)(-1,-4)(-3

2
,-5

2
)(-2,-2)(-3,-2)
17

4
3+5

2
2+1

2
10
47(1,-3)4
(3

2
,-3

2
)(-1,-4)(1

2
,-9

2
)(3,-2)
5
52+10
53(4,0)5
(3,0)(3,-2)(5,-4

3
)(5,4

3
)(9

2
,3

2
)
31

6
14

3
+3

2
2+5

6
10
59(2,4)4
(1,3)(1,5)(4,5)(2,3)
4
6+22
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)
55

12
3+32+1

3
10
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)
23

6
2+32+1

3
10
71(-4,-2)4
(-5,-2)(-4,-3)(-3,-2)(-4,-1)
2
42
73(-4,-4)4
(-4,-3)(-11

2
,-9

2
)(-9

2
,-11

2
)(-3,-4)
3
52
79(2,-4)4
(1

2
,-9

2
)(3,-2)(15

4
,-17

4
)(2,-6)
51

8
23

4
2+3

4
10
83(5,-3)5
(6,-5

3
)(6,-5)(15

4
,-17

4
)(3,-2)(5,-4

3
)
95

12
10

3
+5

2
10
89(5,3)6
(4,5)(4,2)(9

2
,3

2
)(5,4

3
)(6,5

3
)(6,3)
59

12
13

3
+5

2
2+1

2
10
97(-1,5)5
(0,5)(-3

2
,7

2
)(-3,5)(-2,6)(-1,6)
17

4
1+52
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