Prime Number or Not?

Random Science or This or That Quiz

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

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

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