Is 9920 a prime number?
No, 9920 is not a prime number. It is divisible by 2: 9920 = 2 × 4960.
Is 9920 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 √9920 ≈ 99.60. If none of them divides 9920, it is prime.
- 3
2 divides 9920 exactly, so it is not prime. Its prime factorisation is
LaTeX source of the formulas on this page
\[ 9920 = 2^{6} \times 5 \times 31 \]Testing 9920 by the primes up to its square root
| Prime | Division | Result |
|---|---|---|
| 2 | 9920 ÷ 2 | divides exactly (4960) |
| 3 | 9920 ÷ 3 | leaves 2 |
| 5 | 9920 ÷ 5 | divides exactly (1984) |
| 7 | 9920 ÷ 7 | leaves 1 |
| 11 | 9920 ÷ 11 | leaves 9 |
| 13 | 9920 ÷ 13 | leaves 1 |
| 17 | 9920 ÷ 17 | leaves 9 |
| 19 | 9920 ÷ 19 | leaves 2 |
| 23 | 9920 ÷ 23 | leaves 7 |
| 29 | 9920 ÷ 29 | leaves 2 |
| 31 | 9920 ÷ 31 | divides exactly (320) |
| 37 | 9920 ÷ 37 | leaves 4 |
Questions
Is 9920 a prime number?
No, 9920 is not a prime number. It is divisible by 2: 9920 = 2 × 4960.
What is the next prime after 9920?
9923.
What is the prime number before 9920?
9907.
What are the factors of 9920?
1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 155, 160, 248, 310, 320, 496, 620, 992, 1240, 1984, 2480, 4960, 9920.