Prime Number or Not?

Random Science or math Quiz

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

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

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Created Dec 14, 2011Editor's PickSourceReportNominate
Tags:math, Numbers, This or That, Guessing Game, Prime Numbers