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1 is neither a prime, nor a composite number. A Prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1 and 0. 1 and 0 are neither prime, nor composite.

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Q: Is 1 a prime number--why
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Can a square number be prime numberwhy or why not?

no. a prime is only divisible by 1 and itself. a square number is two of of the same number multiplied together (5x5=25), giving it more than just two factors.


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Is 1 a mersenne prime?

1 is not a Mersenne prime because 21 - 1 = 2 - 1 = 1 and 1 is not a prime number.


Is 1 a prime or prime?

No 1 is neither a prime number or a composite number


Is 1 a prime number or not?

1 is not a prime number. By definition, a prime number has exactly two distinct divisors: 1 and itself. Thus, 1 cannot be a prime.

Related questions

Can a square number be prime numberwhy or why not?

no. a prime is only divisible by 1 and itself. a square number is two of of the same number multiplied together (5x5=25), giving it more than just two factors.


Is 247 a rational or real numberwhy?

It is both. Rational numbers are numbers that can be written as a fraction. All rationals are real.


How many prime numbers between 1 and 8888888888888888888888888888888888888888888888?

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Is 1 a prime factor of thirty?

No, 1 is not prime.


Is 1 a mersenne prime?

1 is not a Mersenne prime because 21 - 1 = 2 - 1 = 1 and 1 is not a prime number.


Is 1 a prime or prime?

No 1 is neither a prime number or a composite number


Is the number 1 a prime or a unit?

1 is not prime.


Why is 1 not in a prime factorization?

1 is not a prime number.


Is 1 a prime number or not?

1 is not a prime number. By definition, a prime number has exactly two distinct divisors: 1 and itself. Thus, 1 cannot be a prime.


Are 1 and 2 prime numbers?

2 is a prime number. 1 is not a prime number


Is 43 prime composite or neither?

43 is a prime number. A prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1 and 0. 1 and 0 are neither prime, nor composite.


Is 1 a prime no?

1 is not considered to be a prime or composite number.