What is the Least Common Multiple of 1256 and 1276?

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 of 1256 and 1276 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 1256 and 1276, than apply into the LCM equation.

GCF(1256,1276) = 4
LCM(1256,1276) = ( 1256 × 1276) / 4
LCM(1256,1276) = 1602656 / 4
LCM(1256,1276) = 400664

Least Common Multiple (LCM) of 1256 and 1276 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 1256 and 1276. First we will calculate the prime factors of 1256 and 1276.

Prime Factorization of 1256

Prime Factorization of 1276

Now multiplying the highest exponent prime factors to calculate the LCM of 1256 and 1276.

LCM(1256,1276) = 2³ × 157¹ × 11¹ × 29¹
LCM(1256,1276) = 400664