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
66
66
85
85
39
39
73
73
98
98
29
29
1
1
25
25
79
79
100
100
2
2
48
48
84
84
41
41
20
20
11
11
95
95
8
8
62
62
72
72
9
9
3
3
33
33
51
51
14
14
38
38
75
75
43
43
10
10
16
16
22
22
44
44
58
58
52
52
67
67
17
17
42
42
46
46
37
37
59
59
53
53
49
49
68
68
91
91
7
7
6
6
26
26
28
28
77
77
76
76
31
31
93
93
15
15
54
54
55
55
36
36
78
78
83
83
60
60
23
23
61
61
34
34
30
30
86
86
94
94
19
19
21
21
87
87
27
27
24
24
5
5
80
80
35
35
18
18
74
74
89
89
32
32
4
4
40
40
13
13
50
50
69
69
12
12
97
97
45
45
88
88
81
81
65
65
70
70
63
63
82
82
64
64
99
99
96
96
56
56
90
90
57
57
71
71
92
92
47
47