What is the Least Common Multiple of 1291 and 1307?

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 1291 and 1307 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 1291 and 1307, than apply into the LCM equation.

GCF(1291,1307) = 1
LCM(1291,1307) = ( 1291 × 1307) / 1
LCM(1291,1307) = 1687337 / 1
LCM(1291,1307) = 1687337

Least Common Multiple (LCM) of 1291 and 1307 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 1291 and 1307. First we will calculate the prime factors of 1291 and 1307.

Prime Factorization of 1291

Prime Factorization of 1307

Now multiplying the highest exponent prime factors to calculate the LCM of 1291 and 1307.

LCM(1291,1307) = 1291¹ × 1307¹
LCM(1291,1307) = 1687337