Two or more integers are coprime if they have no positive factors in common other than 1.
There are lots of ways used to say or write this:
- a is coprime to b.
- a is relatively prime to b.
- a is mutually prime to b.
- hcf(a,b)=1.
- gcd(a,b)=1.
- a⊥b.
For example, 14 and 15 are coprime to each other as 14=2×7 and 15=3×5: they have no positive common factors other than 1.