68 has two prime factors: 2 and 17.
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Prime factors of 68 are 22 x 17.
How about: 2*2*17 = 68 as a product of its prime factors
68 is a composite number because it has more than two factors and it is not a prime or a square number
1, 2, 4, 8, 16, 17, 34, 68, 136, 272, 289, 578, 1156, 2312, 4624 2 and 17 are prime.
17 is a prime number but 68 is Composite.