composite: 1, 2, 4, 7, 14, 28
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Composite. Its prime factors are 2×2×7.
28 is a composite number because it has more than two factors but 29 is a prime number because it has only two factors.
To find the prime factors of 28 start with any factor pair of 28 and keep factoring the composite factors until all the factors are prime. 28 2 x 14 2 x 2 x 7 The three prime factors of 28 are 2, 2, 7.
composite and 2*2*7 = 28
There is not such a thing as a composite prime number. A prime number has exactly two factors. A composite number has more than two factors.