What is the Least Common Multiple of 1243 and 1253?

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 1243 and 1253 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 1243 and 1253, than apply into the LCM equation.

GCF(1243,1253) = 1
LCM(1243,1253) = ( 1243 × 1253) / 1
LCM(1243,1253) = 1557479 / 1
LCM(1243,1253) = 1557479

Least Common Multiple (LCM) of 1243 and 1253 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 1243 and 1253. First we will calculate the prime factors of 1243 and 1253.

Prime Factorization of 1243

Prime Factorization of 1253

Now multiplying the highest exponent prime factors to calculate the LCM of 1243 and 1253.

LCM(1243,1253) = 11¹ × 113¹ × 7¹ × 179¹
LCM(1243,1253) = 1557479