GCF (HCF) of 5 and 7
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What is the Greatest Common Divisor of 5 and 7?
Answer
GCF (HCF) of 5 and 7 is
1
Common factors: 1
Only 1 divides both: 5 and 7 share no prime factor.
Such numbers are called coprime (relatively prime); their LCM is just the product: 5 × 7 = 35.
5 — prime
7 — prime
| Prime | 5 | 7 | Lowest power |
|---|---|---|---|
| 5 | 5 | — | — |
| 7 | — | 7 | — |
— = power 0: the prime is not a factor of this number, so it cannot be in the GCF.
GCF = 1
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See Also
- Least Common Multiple - Find the Least Common Multiple (LCM) of two numbers
- Greatest Common Factor of 3 Numbers - Find the Greatest Common Factor (GCF) of three numbers
- Least Common Multiple of 3 Numbers - Find the Least Common Multiple (LCM) of three numbers
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