55 Divide by 5.
11,5 Stop. All the factors are prime.
5 x 11 = 55
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There are no exponents needed. The prime factorization of 55 is: 5 x 11
55 5,11
11 and 5
No, 3x5x4 is not a prime factorization of 60. A prime factorization of 60 would consist of only prime numbers. The prime factorization of 60 is 2x2x3x5.
When all the factors are prime numbers, that's a prime factorization.