Is 30 a prime number?

Prime Number Checker
Number

Is 30 a prime or composite number?

Answer

Number 30 is not a Prime

30 = 2 × 3 × 5

30 has 8 divisors — 1, 2, 3, 5, 6, 10, 15 and 30; a prime has exactly two: 1 and itself.

Primes up to √30

5² = 25 ≤ 30 < 36 = 6², so it is enough to try primes up to 5

  • ÷2 divides

30 ÷ 2 = 15 — 2 divides 30, so 30 is composite

Nearest primes: 29 and 31

Related Calculations

See Also

Prime numbers list

NumberIs Prime
15No: 3 × 5
16No: 2⁴
17Yes
18No: 2 × 3²
19Yes
20No: 2² × 5
21No: 3 × 7
22No: 2 × 11
23Yes
24No: 2³ × 3
25No: 5²
26No: 2 × 13
27No: 3³
28No: 2² × 7
29Yes
30No: 2 × 3 × 5
31Yes
32No: 2⁵
33No: 3 × 11
34No: 2 × 17
35No: 5 × 7
36No: 2² × 3²
37Yes
38No: 2 × 19
39No: 3 × 13
40No: 2³ × 5
41Yes
42No: 2 × 3 × 7
43Yes
44No: 2² × 11

FAQ

Is 30 a prime or composite number?

Number 30 is not a Prime

How many factors are in a number 30?

8

How to check if 30 is prime?

Divide 30 by the primes in order: 5² = 25 ≤ 30 < 36 = 6², so it is enough to try primes up to 5. The first one that divides it is 2: 30 ÷ 2 = 15, so 30 is composite.

See Also