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

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