Is 253 a prime number?

No, 253 is not a prime number. It is a composite number: 253 = 11 × 23.

Why 253 is not prime

253 has divisors other than 1 and itself. The smallest is 11: 253 ÷ 11 = 23.

Prime factorization: 253 = 11 × 23.

Quick facts about 253

Even or odd: odd.
Nearest primes: 251 below and 257 above.
Primes up to 253: 54.

Is it prime? Nearby numbers

Number	Prime?
249	No, 3 × 83
250	No, 2 × 5 × 5 × 5
251	Yes
252	No, 2 × 2 × 3 × 3 × 7
254	No, 2 × 127
255	No, 3 × 5 × 17
256	No, 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2
257	Yes

More about 253: 253 in binary.

Another number? Use the prime number checker for any value, or see the list of prime numbers.