100 is equal to 10 x 10, or 2 x 2 x 5 x 5, so it is composite.
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100 is composite.
1 is special 2 prime 3 prime 4 composite 5 prime 6 composite 7 prime 8 composite 9 composite 10 composite 11 prime 12 composite ext.
102
100 is composite, because it has more than 2 factors.
100 is composite. 100 = 2 * 2 * 5 * 5 = 22 * 52