GCF and LCM Calculator Logo

What is the Least Common Multiple of 257 and 261?

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 257 and 261 is 67077.

LCM(257,261) = 67077

LCM Calculator and
and

Least Common Multiple of 257 and 261 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 257 and 261, than apply into the LCM equation.

GCF(257,261) = 1
LCM(257,261) = ( 257 × 261) / 1
LCM(257,261) = 67077 / 1
LCM(257,261) = 67077

Least Common Multiple (LCM) of 257 and 261 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 257 and 261. First we will calculate the prime factors of 257 and 261.

Prime Factorization of 257

Prime factors of 257 are 257. Prime factorization of 257 in exponential form is:

257 = 2571

Prime Factorization of 261

Prime factors of 261 are 3, 29. Prime factorization of 261 in exponential form is:

261 = 32 × 291

Now multiplying the highest exponent prime factors to calculate the LCM of 257 and 261.

LCM(257,261) = 2571 × 32 × 291
LCM(257,261) = 67077