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    Is 80 a prime number?

    Prime Number Checker
    Number

    Is 80 a prime or composite number?

    Answer

    Number 80 is not a Prime

    80 = 2⁴ × 5

    80 has 10 divisors, not two: a prime is divisible only by 1 and itself.

    Primes up to √80

    8² = 64 ≤ 80 < 81 = 9², so it is enough to try primes up to 8

    • ÷2 divides

    80 ÷ 2 = 40 — 2 divides 80, so 80 is composite

    Nearest primes: 79 and 83

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    Is 80 a prime number? Is 80 a prime number? 80 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
    65No: 5 × 13
    66No: 2 × 3 × 11
    67Yes
    68No: 2² × 17
    69No: 3 × 23
    70No: 2 × 5 × 7
    71Yes
    72No: 2³ × 3²
    73Yes
    74No: 2 × 37
    75No: 3 × 5²
    76No: 2² × 19
    77No: 7 × 11
    78No: 2 × 3 × 13
    79Yes
    80No: 2⁴ × 5
    81No: 3⁴
    82No: 2 × 41
    83Yes
    84No: 2² × 3 × 7
    85No: 5 × 17
    86No: 2 × 43
    87No: 3 × 29
    88No: 2³ × 11
    89Yes
    90No: 2 × 3² × 5
    91No: 7 × 13
    92No: 2² × 23
    93No: 3 × 31
    94No: 2 × 47

    FAQ

    Is 80 a prime or composite number?

    Number 80 is not a Prime

    How many factors are in a number 80?

    10

    How to check if 80 is prime?

    Divide 80 by the primes in order: 8² = 64 ≤ 80 < 81 = 9², so it is enough to try primes up to 8. The first one that divides it is 2: 80 ÷ 2 = 40, so 80 is composite.

    See Also