Prime Number or Not?

Random Science or math Quiz

Can you name the prime numbers (p) and composite numbers (n)?

Updated Feb 16, 2015

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Number'P'rime or 'N'ot?
87
117
101
15
1967
55
999
114
153
1999
137
207
253
11
1337
107
31
47
123
105
Number'P'rime or 'N'ot?
43
77
73
59
1747
83
21
149
7
41
267
989
103
13
2
17
89
1000
321
703
Number'P'rime or 'N'ot?
639
27
53
5
151
222
49
141
23
199
2001
201
751
42
1551
71
51
29
63
1001
Number'P'rime or 'N'ot?
1103
263
37
2011
947
641
2013
3
111
171
61
4
79
69
97
187
99
19
225
67

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