05/05/2026
A prime number is a number greater than 1 with exactly two factors: 1 and itself (like 2, 3, 5).
The number 1 only has one factor, so it’s not prime.
Composite numbers have more than two factors (like 4 or 6).
If 1 were prime, it would break the rule that every number has one unique prime factorisation - maths would get messy.
Simple rules, big reasons ✨
Ever wondered why something so basic like 1 doesn’t quite belong? 🤔