Is 743 a prime number?

Prime Number Checker
Number

Is 743 a prime or composite number?

Answer

Number 743 is a Prime

743 has exactly two divisors — 1 and 743 — so it is a prime.

Primes up to √743

27² = 729 ≤ 743 < 784 = 28², so it is enough to try primes up to 27

  • ÷2 does not divide
  • ÷3 does not divide
  • ÷5 does not divide
  • ÷7 does not divide
  • ÷11 does not divide
  • ÷13 does not divide
  • ÷17 does not divide
  • ÷19 does not divide
  • ÷23 does not divide

none of the 9 primes up to 27 divides 743 — 743 is prime

Nearest primes: 739 and 751

Related Calculations

See Also

Prime numbers list

NumberIs Prime
719Yes
721No: 7 × 103
723No: 3 × 241
724No: 2² × 181
727Yes
729No: 3⁶
731No: 17 × 43
732No: 2² × 3 × 61
733Yes
736No: 2⁵ × 23
737No: 11 × 67
738No: 2 × 3² × 41
739Yes
741No: 3 × 13 × 19
742No: 2 × 7 × 53
743Yes
748No: 2² × 11 × 17
750No: 2 × 3 × 5³
751Yes
755No: 5 × 151
756No: 2² × 3³ × 7
757Yes
759No: 3 × 11 × 23
761Yes
767No: 13 × 59
769Yes
771No: 3 × 257
773Yes
775No: 5² × 31
776No: 2³ × 97

FAQ

Is 743 a prime or composite number?

Number 743 is a Prime

How many factors are in a number 743?

2

How to check if 743 is prime?

Divide 743 by the primes in order: 27² = 729 ≤ 743 < 784 = 28², so it is enough to try primes up to 27. None of the 9 primes up to 27 divides 743, so 743 is prime.

See Also