Is 240 a prime number?
No, 240 is not a prime number. It is divisible by 2: 240 = 2 × 120.
Is 240 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 √240 ≈ 15.49. If none of them divides 240, it is prime.
- 3
2 divides 240 exactly, so it is not prime. Its prime factorisation is
LaTeX source of the formulas on this page
\[ 240 = 2^{4} \times 3 \times 5 \]Testing 240 by the primes up to its square root
| Prime | Division | Result |
|---|---|---|
| 2 | 240 ÷ 2 | divides exactly (120) |
| 3 | 240 ÷ 3 | divides exactly (80) |
| 5 | 240 ÷ 5 | divides exactly (48) |
| 7 | 240 ÷ 7 | leaves 2 |
| 11 | 240 ÷ 11 | leaves 9 |
| 13 | 240 ÷ 13 | leaves 6 |
Questions
Is 240 a prime number?
No, 240 is not a prime number. It is divisible by 2: 240 = 2 × 120.
What is the next prime after 240?
241.
What is the prime number before 240?
239.
What are the factors of 240?
1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 240.