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It's a question of how "prime" is defined. Mathematicians have chosen not to include 1 in their set of prime numbers, possibly because they feel it makes things easier.
Every positive integer can be written as a product of prime numbers (prime factorization). In fact, every positive integer has only one prime factorization. (Reordering the primes doesn't count, e.g. 2x3x3 is the same as 3x2x3.) This would no longer be true if 1 was a Prime number. For instance: 14 = 2x7 = 1x2x7 = 1x1x2x7 = 1x1x1x2x7. Every positive integer would have infinitely many prime factorizations. You's have to rewrite the theorem to say "...only one prime factorization WITHOUT A 1", which would be more awkward.
There are probably more examples out there, but I can't think of any good ones at the moment.
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Is 1 the lowest prime number?
No; 1 is not a prime number. The lowest prime number is 2.
Can 1 be a prime factor of a number?
No - as 1 is not a prime number.
Why 0 and 1 are not a prime number?
0 and 1 is not prime number because the prime number can only be divided by the number 1 and itself.
Why is 67 a prime number?
Look at the definition of a prime number. A prime number has no factors, other than 1, or itself.Look at the definition of a prime number. A prime number has no factors, other than 1, or itself.Look at the definition of a prime number. A prime number has no factors, other than 1, or itself.Look at the definition of a prime number. A prime number has no factors, other than 1, or itself.
What is you called when the prime factorization of a number is 1 and itself?
You is called a prime number!You is called a prime number!You is called a prime number!You is called a prime number!
is the number 1 a prime number?
no 1 is not a prime number
Is 1 the lowest prime number?
No; 1 is not a prime number. The lowest prime number is 2.
Is 1 a prime or prime?
No 1 is neither a prime number or a composite number
What numbers is prime number?
A prime number is a number that is only divisible by itself and 1. 1 is NOT a prime number.
Can 1 be a prime factor of a number?
No - as 1 is not a prime number.
Can 1 be a prime number?
no it can not be a prime number as a prime number has has to have 2 factors in it and 1 only has 1 factor itself
Why 0 and 1 are not a prime number?
0 and 1 is not prime number because the prime number can only be divided by the number 1 and itself.
Are 1 and 2 prime numbers?
2 is a prime number. 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.
Is 1 a prime number or a compostie number or neither?
1 is a prime number.
Why is 67 a prime number?
Look at the definition of a prime number. A prime number has no factors, other than 1, or itself.Look at the definition of a prime number. A prime number has no factors, other than 1, or itself.Look at the definition of a prime number. A prime number has no factors, other than 1, or itself.Look at the definition of a prime number. A prime number has no factors, other than 1, or itself.
What are all of the factors of a prime number?
It is always 1 and the prime number itself.
