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

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