Any integer greater than 1 is either a **prime number**, or can be written as a **unique product of prime numbers**.

Similarly, we can continue writing ,

10 is 2×5

11 is Prime,

12 is 2×2×3

13 is Prime

14 is 2×7

15 is 3×5

16 is 2×2×2×2

17 is Prime

So they are either **prime**, or **primes multiplied together**

**Example:**

Make 42 by multiplying **only prime numbers?**

2 × 3 × 7 = 42

Yes, **2**, **3** and **7** are prime numbers, and when multiplied together they make **42**.