Is 10 a prime number?
No, 10 is not a prime number. It is divisible by 2: 10 = 2 × 5.
Is 10 prime?
Pick any whole number from 1 to 10,000.
How to work it out
- 1
A prime number has exactly two factors: 1 and itself.
- 2
It is enough to test the primes up to √10 ≈ 3.16. If none of them divides 10, it is prime.
- 3
2 divides 10 exactly, so it is not prime. Its prime factorisation is
LaTeX source of the formulas on this page
\[ 10 = 2 \times 5 \]
Testing 10 by the primes up to its square root
| Prime | Division | Result |
|---|---|---|
| 2 | 10 ÷ 2 | divides exactly (5) |
| 3 | 10 ÷ 3 | leaves 1 |
Questions
Is 10 a prime number?
No, 10 is not a prime number. It is divisible by 2: 10 = 2 × 5.
What is the next prime after 10?
11.
What is the prime number before 10?
7.
What are the factors of 10?
1, 2, 5, 10.