GCF for 3, 4 and 5

"Greatest Common Factor of 3 Numbers" Calculator
Greatest Common Factor of
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What's the Greatest Common Factor (GCF) of 3, 4 and 5?

Answer

GCF of 3, 4 and 5 is
1

Common factors: 1

Only 1 divides all three: no prime is a factor of each of 3, 4 and 5.

The three numbers are pairwise coprime: no two of them share a factor other than 1.

3 — prime

4 = 22

5 — prime

Prime345Lowest power
2—22——
33———
5——5—

— = power 0: the prime is not a factor of this number, so it cannot be in the GCF.

GCF = 1

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GCF Table

1st2nd3rdGCF
1341
2341
3341
3441
3451
3461
3471
3481
3491
34101
34111
34121
34131
34141
34151
34161
34171
34181
34191
34201
34211
34221
34231
34241
34251
34261
34271
34281
34291
34301

FAQ

What's the Greatest Common Factor (GCF) of 3, 4 and 5?

GCF of 3, 4 and 5 is 1

What prime factors do 3, 4 and 5 share?

None at all: 3, 4 and 5 have no prime factor in common, so the only positive integer dividing all three is 1 and their GCF is 1.

Can you get the GCF of 3, 4 and 5 two numbers at a time?

Yes. The GCF of 3 and 4 is 1, and the GCF of 1 and 5 is 1 — the same answer, because the greatest common factor is associative and does not depend on the order of the three numbers.

How does the GCF simplify the ratio 3 : 4 : 5?

Divide every term by the GCF 1: 3 ÷ 1 = 3, 4 ÷ 1 = 4 and 5 ÷ 1 = 5. So 3 : 4 : 5 in lowest terms is 3 : 4 : 5, and no whole number other than 1 divides all three of those.

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