# What is the Least Common Multiple of 78 and 88?

*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 78 and 88 is **3432**.

LCM(78,88) = 3432

## Least Common Multiple of 78 and 88 with GCF Formula

The formula of **LCM** is LCM(a,b) = ( a × b) / GCF(a,b).

We need to calculate greatest common factor 78 and 88, than apply into the LCM equation.

GCF(78,88) = 2

LCM(78,88) = ( 78 × 88) / 2

LCM(78,88) = 6864 / 2

LCM(78,88) = 3432

## Least Common Multiple (LCM) of 78 and 88 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 78 and 88. First we will calculate the **prime factors of 78 and 88**.

### Prime Factorization of 78

Prime factors of 78 are 2, 3, 13. Prime factorization of **78** in exponential form is:

78 = 2^{1} × 3^{1} × 13^{1}

### Prime Factorization of 88

Prime factors of 88 are 2, 11. Prime factorization of **88** in exponential form is:

88 = 2^{3} × 11^{1}

Now multiplying the highest exponent prime factors to calculate the **LCM of 78 and 88**.

LCM(78,88) = 2^{3} × 3^{1} × 13^{1} × 11^{1}

LCM(78,88) = 3432