The primary factorization regarding 70 is 2 x 5 x 7. Put simply, 70 can be expressed as a product of its prime factors which are 2, 5, and 7. Expressing 70 as a product of its prime factors 2, 5, and 7 is known as the prime factorization of 70. These prime factors are the building blocks that make up the number 70. By performing the method of prime factorization on 70, we can determine that 2, 5, and 7 are its prime factors. Basically, we are splitting down the number 70 into its constituent prime elements. Decomposing the number 70 into its primary factors 2, 5, and 7 is called finding the prime factors of 70. By doing this we are expressing 70 as a product of its prime factors.