Is 1357 a prime number?
No, 1357 is not a prime number. It is divisible by 23: 1357 = 23 × 59.
Is 1357 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 √1357 ≈ 36.84. If none of them divides 1357, it is prime.
- 3
23 divides 1357 exactly, so it is not prime. Its prime factorisation is
LaTeX source of the formulas on this page
\[ 1357 = 23 \times 59 \]
Testing 1357 by the primes up to its square root
| Prime | Division | Result |
|---|---|---|
| 2 | 1357 ÷ 2 | leaves 1 |
| 3 | 1357 ÷ 3 | leaves 1 |
| 5 | 1357 ÷ 5 | leaves 2 |
| 7 | 1357 ÷ 7 | leaves 6 |
| 11 | 1357 ÷ 11 | leaves 4 |
| 13 | 1357 ÷ 13 | leaves 5 |
| 17 | 1357 ÷ 17 | leaves 14 |
| 19 | 1357 ÷ 19 | leaves 8 |
| 23 | 1357 ÷ 23 | divides exactly (59) |
| 29 | 1357 ÷ 29 | leaves 23 |
| 31 | 1357 ÷ 31 | leaves 24 |
Questions
Is 1357 a prime number?
No, 1357 is not a prime number. It is divisible by 23: 1357 = 23 × 59.
What is the next prime after 1357?
1361.
What is the prime number before 1357?
1327.
What are the factors of 1357?
1, 23, 59, 1357.