Is 771 a prime number?
No, 771 is not a prime number. It is divisible by 3: 771 = 3 × 257.
Is 771 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 √771 ≈ 27.77. If none of them divides 771, it is prime.
- 3
3 divides 771 exactly, so it is not prime. Its prime factorisation is
LaTeX source of the formulas on this page
\[ 771 = 3 \times 257 \]
Testing 771 by the primes up to its square root
| Prime | Division | Result |
|---|---|---|
| 2 | 771 ÷ 2 | leaves 1 |
| 3 | 771 ÷ 3 | divides exactly (257) |
| 5 | 771 ÷ 5 | leaves 1 |
| 7 | 771 ÷ 7 | leaves 1 |
| 11 | 771 ÷ 11 | leaves 1 |
| 13 | 771 ÷ 13 | leaves 4 |
| 17 | 771 ÷ 17 | leaves 6 |
| 19 | 771 ÷ 19 | leaves 11 |
| 23 | 771 ÷ 23 | leaves 12 |
Questions
Is 771 a prime number?
No, 771 is not a prime number. It is divisible by 3: 771 = 3 × 257.
What is the next prime after 771?
773.
What is the prime number before 771?
769.
What are the factors of 771?
1, 3, 257, 771.