David professionalDavid MurdochDSM
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Divisibles

Enter a number equal or greater than 1 and 1 to N blocks will appear in a random order. Hover over a block to see which numbers are its divisors or whether that number is prime.

is not a prime number
97
97
54
54
13
13
57
57
24
24
33
33
90
90
14
14
38
38
46
46
61
61
26
26
91
91
96
96
51
51
89
89
39
39
29
29
86
86
78
78
21
21
66
66
85
85
1
1
31
31
59
59
56
56
16
16
2
2
42
42
3
3
82
82
45
45
83
83
55
55
92
92
67
67
30
30
41
41
71
71
76
76
68
68
81
81
17
17
4
4
99
99
52
52
75
75
58
58
94
94
63
63
5
5
32
32
98
98
28
28
100
100
6
6
87
87
20
20
62
62
44
44
36
36
34
34
27
27
70
70
49
49
7
7
95
95
25
25
50
50
35
35
77
77
74
74
60
60
53
53
40
40
64
64
73
73
48
48
22
22
12
12
72
72
8
8
65
65
9
9
43
43
23
23
19
19
93
93
88
88
69
69
37
37
10
10
11
11
79
79
84
84
15
15
18
18
80
80
47
47