Two integers are coprime if they have no common positive divisors other than 1, which means their greatest common divisor equals 1. This is equivalent to being relatively prime.
From Latin prefix 'co-' meaning 'together' and 'primus' meaning 'first.' The term emerged in 20th-century mathematical literature as a more concise way to express the concept of relative primality.
Coprime numbers have a beautiful property: if you pick two random large integers, there's about a 61% chance they'll be coprime! This surprising probability, related to 6/π², reveals deep connections between number theory and geometry.
Complete word intelligence in one call. Free tier — 50 lookups/day.