Is 9955 a prime number?
No, 9955 is not a prime number. It is divisible by 5: 9955 = 5 × 1991.
Is 9955 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 √9955 ≈ 99.77. If none of them divides 9955, it is prime.
- 3
5 divides 9955 exactly, so it is not prime. Its prime factorisation is
LaTeX source of the formulas on this page
\[ 9955 = 5 \times 11 \times 181 \]
Testing 9955 by the primes up to its square root
| Prime | Division | Result |
|---|---|---|
| 2 | 9955 ÷ 2 | leaves 1 |
| 3 | 9955 ÷ 3 | leaves 1 |
| 5 | 9955 ÷ 5 | divides exactly (1991) |
| 7 | 9955 ÷ 7 | leaves 1 |
| 11 | 9955 ÷ 11 | divides exactly (905) |
| 13 | 9955 ÷ 13 | leaves 10 |
| 17 | 9955 ÷ 17 | leaves 10 |
| 19 | 9955 ÷ 19 | leaves 18 |
| 23 | 9955 ÷ 23 | leaves 19 |
| 29 | 9955 ÷ 29 | leaves 8 |
| 31 | 9955 ÷ 31 | leaves 4 |
| 37 | 9955 ÷ 37 | leaves 2 |
Questions
Is 9955 a prime number?
No, 9955 is not a prime number. It is divisible by 5: 9955 = 5 × 1991.
What is the next prime after 9955?
9967.
What is the prime number before 9955?
9949.
What are the factors of 9955?
1, 5, 11, 55, 181, 905, 1991, 9955.