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What is the Least Common Multiple of 7900 and 7910?

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 7900 and 7910 is 6248900.

LCM(7900,7910) = 6248900

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Least Common Multiple of 7900 and 7910 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 7900 and 7910, than apply into the LCM equation.

GCF(7900,7910) = 10
LCM(7900,7910) = ( 7900 × 7910) / 10
LCM(7900,7910) = 62489000 / 10
LCM(7900,7910) = 6248900

Least Common Multiple (LCM) of 7900 and 7910 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 7900 and 7910. First we will calculate the prime factors of 7900 and 7910.

Prime Factorization of 7900

Prime factors of 7900 are 2, 5, 79. Prime factorization of 7900 in exponential form is:

7900 = 22 × 52 × 791

Prime Factorization of 7910

Prime factors of 7910 are 2, 5, 7, 113. Prime factorization of 7910 in exponential form is:

7910 = 21 × 51 × 71 × 1131

Now multiplying the highest exponent prime factors to calculate the LCM of 7900 and 7910.

LCM(7900,7910) = 22 × 52 × 791 × 71 × 1131
LCM(7900,7910) = 6248900