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The first step in using primes for finding LCM is to find the factors of the given numbers. The LCM of the given numbers is the product of all the prime factors to their greatest power.

Prime factors of 72 are 23 x 32

Prime factors of 147 are 3 x 72

The LCM of 72 and 147 is 23 x 32 x 72 = 8 x 9 x 49 = 3528

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Q: What is the lcm of 72 and 147 using prime numbers?
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