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What is the Least Common Multiple of 65978 and 65991?

Least common multiple or lowest common denominator (lcd) can be calculated in two way; with the LCM formula calculation of greatest common factor (GCF), or multiplying the prime factors with the highest exponent factor.

Least common multiple (LCM) of 65978 and 65991 is 4353954198.

LCM(65978,65991) = 4353954198

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Least Common Multiple of 65978 and 65991 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 65978 and 65991, than apply into the LCM equation.

GCF(65978,65991) = 1
LCM(65978,65991) = ( 65978 × 65991) / 1
LCM(65978,65991) = 4353954198 / 1
LCM(65978,65991) = 4353954198

Least Common Multiple (LCM) of 65978 and 65991 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 65978 and 65991. First we will calculate the prime factors of 65978 and 65991.

Prime Factorization of 65978

Prime factors of 65978 are 2, 11, 2999. Prime factorization of 65978 in exponential form is:

65978 = 21 × 111 × 29991

Prime Factorization of 65991

Prime factors of 65991 are 3, 21997. Prime factorization of 65991 in exponential form is:

65991 = 31 × 219971

Now multiplying the highest exponent prime factors to calculate the LCM of 65978 and 65991.

LCM(65978,65991) = 21 × 111 × 29991 × 31 × 219971
LCM(65978,65991) = 4353954198