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    Is 1005 a prime number?

    Prime Number Checker
    Number

    Is 1,005 a prime or composite number?

    Answer

    Number 1,005 is not a Prime

    1,005 = 3 × 5 × 67

    1,005 has 8 divisors — 1, 3, 5, 15, 67, 201, 335 and 1,005; a prime has exactly two: 1 and itself.

    Primes up to √1,005

    31² = 961 ≤ 1,005 < 1,024 = 32², so it is enough to try primes up to 31

    • ÷2 does not divide
    • ÷3 divides

    1,005 ÷ 3 = 335 — 3 divides 1,005, so 1,005 is composite

    Nearest primes: 997 and 1,009

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    Is 1005 a prime number? Is 1,005 a prime number? 1,005 is a composite number. Check if any number is prime or composite with our free online prime checker.
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    Prime numbers list

    NumberIs Prime
    982No: 2 × 491
    983Yes
    986No: 2 × 17 × 29
    987No: 3 × 7 × 47
    988No: 2² × 13 × 19
    989No: 23 × 43
    990No: 2 × 3² × 5 × 11
    991Yes
    993No: 3 × 331
    994No: 2 × 7 × 71
    996No: 2² × 3 × 83
    997Yes
    999No: 3³ × 37
    1,000No: 2³ × 5³
    1,001No: 7 × 11 × 13
    1,005No: 3 × 5 × 67
    1,010No: 2 × 5 × 101
    1,015No: 5 × 7 × 29
    1,020No: 2² × 3 × 5 × 17
    1,025No: 5² × 41
    1,050No: 2 × 3 × 5² × 7
    1,051Yes
    1,085No: 5 × 7 × 31
    1,100No: 2² × 5² × 11
    1,111No: 11 × 101
    1,140No: 2² × 3 × 5 × 19
    1,160No: 2³ × 5 × 29
    1,175No: 5² × 47
    1,185No: 3 × 5 × 79
    1,190No: 2 × 5 × 7 × 17

    FAQ

    Is 1,005 a prime or composite number?

    Number 1,005 is not a Prime

    How many factors are in a number 1,005?

    8

    How to check if 1,005 is prime?

    Divide 1,005 by the primes in order: 31² = 961 ≤ 1,005 < 1,024 = 32², so it is enough to try primes up to 31. The first one that divides it is 3: 1,005 ÷ 3 = 335, so 1,005 is composite.

    See Also