Is 139 a prime number?

Prime Number Checker
Number

Is 139 a prime or composite number?

Answer

Number 139 is a Prime

139 has exactly two divisors — 1 and 139 — so it is a prime.

Primes up to √139

11² = 121 ≤ 139 < 144 = 12², so it is enough to try primes up to 11

  • ÷2 does not divide
  • ÷3 does not divide
  • ÷5 does not divide
  • ÷7 does not divide
  • ÷11 does not divide

none of the 5 primes up to 11 divides 139 — 139 is prime

Nearest primes: 137 and 149

Related Calculations

See Also

Prime numbers list

NumberIs Prime
123No: 3 × 41
125No: 5³
126No: 2 × 3² × 7
127Yes
128No: 2⁷
129No: 3 × 43
130No: 2 × 5 × 13
131Yes
132No: 2² × 3 × 11
133No: 7 × 19
134No: 2 × 67
135No: 3³ × 5
136No: 2³ × 17
137Yes
138No: 2 × 3 × 23
139Yes
140No: 2² × 5 × 7
141No: 3 × 47
142No: 2 × 71
143No: 11 × 13
144No: 2⁴ × 3²
145No: 5 × 29
146No: 2 × 73
147No: 3 × 7²
148No: 2² × 37
149Yes
150No: 2 × 3 × 5²
151Yes
152No: 2³ × 19
153No: 3² × 17

FAQ

Is 139 a prime or composite number?

Number 139 is a Prime

How many factors are in a number 139?

2

How to check if 139 is prime?

Divide 139 by the primes in order: 11² = 121 ≤ 139 < 144 = 12², so it is enough to try primes up to 11. None of the 5 primes up to 11 divides 139, so 139 is prime.

See Also