Is 1550 a prime number?
No, 1550 is not a prime number. It is divisible by 2: 1550 = 2 × 775.
Is 1550 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 √1550 ≈ 39.37. If none of them divides 1550, it is prime.
- 3
2 divides 1550 exactly, so it is not prime. Its prime factorisation is
LaTeX source of the formulas on this page
\[ 1550 = 2 \times 5^{2} \times 31 \]Testing 1550 by the primes up to its square root
| Prime | Division | Result |
|---|---|---|
| 2 | 1550 ÷ 2 | divides exactly (775) |
| 3 | 1550 ÷ 3 | leaves 2 |
| 5 | 1550 ÷ 5 | divides exactly (310) |
| 7 | 1550 ÷ 7 | leaves 3 |
| 11 | 1550 ÷ 11 | leaves 10 |
| 13 | 1550 ÷ 13 | leaves 3 |
| 17 | 1550 ÷ 17 | leaves 3 |
| 19 | 1550 ÷ 19 | leaves 11 |
| 23 | 1550 ÷ 23 | leaves 9 |
| 29 | 1550 ÷ 29 | leaves 13 |
| 31 | 1550 ÷ 31 | divides exactly (50) |
| 37 | 1550 ÷ 37 | leaves 33 |
Questions
Is 1550 a prime number?
No, 1550 is not a prime number. It is divisible by 2: 1550 = 2 × 775.
What is the next prime after 1550?
1553.
What is the prime number before 1550?
1549.
What are the factors of 1550?
1, 2, 5, 10, 25, 31, 50, 62, 155, 310, 775, 1550.