What is the Least Common Multiple of 691 and 709?

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 691 and 709 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 691 and 709, than apply into the LCM equation.

GCF(691,709) = 1
LCM(691,709) = ( 691 × 709) / 1
LCM(691,709) = 489919 / 1
LCM(691,709) = 489919

Least Common Multiple (LCM) of 691 and 709 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 691 and 709. First we will calculate the prime factors of 691 and 709.

Prime Factorization of 691

Prime Factorization of 709

Now multiplying the highest exponent prime factors to calculate the LCM of 691 and 709.

LCM(691,709) = 691¹ × 709¹
LCM(691,709) = 489919