Is 745 a prime number?
No, 745 is not a prime number. It is divisible by 5: 745 = 5 × 149.
Is 745 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 √745 ≈ 27.29. If none of them divides 745, it is prime.
- 3
5 divides 745 exactly, so it is not prime. Its prime factorisation is
LaTeX source of the formulas on this page
\[ 745 = 5 \times 149 \]
Testing 745 by the primes up to its square root
| Prime | Division | Result |
|---|---|---|
| 2 | 745 ÷ 2 | leaves 1 |
| 3 | 745 ÷ 3 | leaves 1 |
| 5 | 745 ÷ 5 | divides exactly (149) |
| 7 | 745 ÷ 7 | leaves 3 |
| 11 | 745 ÷ 11 | leaves 8 |
| 13 | 745 ÷ 13 | leaves 4 |
| 17 | 745 ÷ 17 | leaves 14 |
| 19 | 745 ÷ 19 | leaves 4 |
| 23 | 745 ÷ 23 | leaves 9 |
Questions
Is 745 a prime number?
No, 745 is not a prime number. It is divisible by 5: 745 = 5 × 149.
What is the next prime after 745?
751.
What is the prime number before 745?
743.
What are the factors of 745?
1, 5, 149, 745.