Yes, 41 is a prime number. Its only factors are 1 and 41.
A number is prime if no smaller prime up to its square root divides it. The square root of 41 is about 6.40, so it is enough to test the primes 2, 3 and 5.
| Divide by | Remainder | Divides evenly? |
|---|---|---|
| 2 | 1 | No |
| 3 | 2 | No |
| 5 | 1 | No |
None of them divides 41 evenly, so 41 is prime.
| Number | Prime? |
|---|---|
| 37 | Yes |
| 38 | No, 2 × 19 |
| 39 | No, 3 × 13 |
| 40 | No, 2 × 2 × 2 × 5 |
| 42 | No, 2 × 3 × 7 |
| 43 | Yes |
| 44 | No, 2 × 2 × 11 |
| 45 | No, 3 × 3 × 5 |
More about 41: factors of 41 · 41 squared · square root of 41 · 41 in binary · 41 in Roman numerals.
Another number? Use the prime number checker for any value, or see the list of prime numbers.