Is 42 a prime number?
Here is the answer to questions like: Is 42 a prime number? or is 42 a prime or a composite number?
Use the prime numbers calculator below to discover if any given number is a prime. You can also get a prime numbers chart with all primes before this given number.
What is a prime number?Definition of prime 1An integer greater than one is called a prime number if its only positive divisors (factors) are one and itself. For example, the only divisors of 11 are 1 and 11, so 11 is a prime number, while the number 51 has divisors 3, 17 and 51 itself (51 = 3•17), making 51 not a prime number. Definition of prime 2A positive integer that is not divisible without remainder by any integer except itself and 1, with 1 often excluded. Note that:


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