a prime number has only two factors -- one and itself.
2
1 x 2 |
3
1 x 3 |
5
1 x 5 |
7
1 x 7 |
11
1 x 11 |
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zero and one are not prime numbers!
they do not have 2 factors.
They have only 1 factor.
0 x 0 = 0
1 x 1 = 1
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A composite number has more than 2 factors.
4
1 x 4 2 x 2 |
6
1 x 6 2 x 3 |
8
1 x 8 2 x 4 |
12
1 x 12 2 x 6 3 x 4 |
15
1 x 15 3 x 5 |
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PRIME FACTORIZATION USING FACTOR TREE
or
2 squared x 3 squared = 36
2 squared x 3 squared = 36