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    Is 61 a prime number?

    Prime Number Checker
    Number

    Is 61 a prime or composite number?

    Answer

    Number 61 is a Prime

    61 has exactly two divisors — 1 and 61 — so it is a prime.

    Primes up to √61

    7² = 49 ≤ 61 < 64 = 8², so it is enough to try primes up to 7

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

    none of the 4 primes up to 7 divides 61 — 61 is prime

    Nearest primes: 59 and 67

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    Is 61 a prime number? Is 61 a prime number? 61 is a prime number. Check if any number is prime or composite with our free online prime checker.
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    Prime numbers list

    NumberIs Prime
    46No: 2 × 23
    47Yes
    48No: 2⁴ × 3
    49No: 7²
    50No: 2 × 5²
    51No: 3 × 17
    52No: 2² × 13
    53Yes
    54No: 2 × 3³
    55No: 5 × 11
    56No: 2³ × 7
    57No: 3 × 19
    58No: 2 × 29
    59Yes
    60No: 2² × 3 × 5
    61Yes
    62No: 2 × 31
    63No: 3² × 7
    64No: 2⁶
    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

    FAQ

    Is 61 a prime or composite number?

    Number 61 is a Prime

    How many factors are in a number 61?

    2

    How to check if 61 is prime?

    Divide 61 by the primes in order: 7² = 49 ≤ 61 < 64 = 8², so it is enough to try primes up to 7. None of the 4 primes up to 7 divides 61, so 61 is prime.

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