Is 2921 a prime number?
No, 2921 is not a prime number. It is divisible by 23: 2921 = 23 × 127.
Is 2921 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 √2921 ≈ 54.05. If none of them divides 2921, it is prime.
- 3
23 divides 2921 exactly, so it is not prime. Its prime factorisation is
LaTeX source of the formulas on this page
\[ 2921 = 23 \times 127 \]
Testing 2921 by the primes up to its square root
| Prime | Division | Result |
|---|---|---|
| 2 | 2921 ÷ 2 | leaves 1 |
| 3 | 2921 ÷ 3 | leaves 2 |
| 5 | 2921 ÷ 5 | leaves 1 |
| 7 | 2921 ÷ 7 | leaves 2 |
| 11 | 2921 ÷ 11 | leaves 6 |
| 13 | 2921 ÷ 13 | leaves 9 |
| 17 | 2921 ÷ 17 | leaves 14 |
| 19 | 2921 ÷ 19 | leaves 14 |
| 23 | 2921 ÷ 23 | divides exactly (127) |
| 29 | 2921 ÷ 29 | leaves 21 |
| 31 | 2921 ÷ 31 | leaves 7 |
| 37 | 2921 ÷ 37 | leaves 35 |
Questions
Is 2921 a prime number?
No, 2921 is not a prime number. It is divisible by 23: 2921 = 23 × 127.
What is the next prime after 2921?
2927.
What is the prime number before 2921?
2917.
What are the factors of 2921?
1, 23, 127, 2921.