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What is the Least Common Multiple of 1279 and 1286?

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 1279 and 1286 is 1644794.

LCM(1279,1286) = 1644794

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Least Common Multiple of 1279 and 1286 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 1279 and 1286, than apply into the LCM equation.

GCF(1279,1286) = 1
LCM(1279,1286) = ( 1279 × 1286) / 1
LCM(1279,1286) = 1644794 / 1
LCM(1279,1286) = 1644794

Least Common Multiple (LCM) of 1279 and 1286 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 1279 and 1286. First we will calculate the prime factors of 1279 and 1286.

Prime Factorization of 1279

Prime factors of 1279 are 1279. Prime factorization of 1279 in exponential form is:

1279 = 12791

Prime Factorization of 1286

Prime factors of 1286 are 2, 643. Prime factorization of 1286 in exponential form is:

1286 = 21 × 6431

Now multiplying the highest exponent prime factors to calculate the LCM of 1279 and 1286.

LCM(1279,1286) = 12791 × 21 × 6431
LCM(1279,1286) = 1644794