Is 1 a prime number of not?

The funny thing is it use to be. Well, it was considered prime a long time ago... and then it was debated by mathematicians for centuries. By some definitions it is a prime, by others it isnt.

Really, whether or not it needs to be considered a prime depends a lot on the context of a problem.

Mathematicians never actually resolved the issue through proof or disproof, as far as I know. We resolved the issue solely by redefinition of the prime.

There is now a caveat that says primes must have EXACTLY 2 UNIQUE factors... 1 and itself... no more AND no less.

1 only has itself as a factor... or, one unique factor total. Therefore, its not a prime. Neither is it a composite... its merely the unit number from which all numbers are formed.

In fact, 1 is the only integer that is neither prime nor composite, according to this definition.

But, again, its just a stipulation of definition. If you want to use the more out-dated, generic definition that says primes have one and itself as a factor, with no regard to uniqueness, then yes, 1 is a prime.

1 is neither a composite number nor a prime number.

One is defintely not a prime number.
A prime number is a number that can be divided by two numbers only. That is itself and 1. e.g. 7 can only be divided by 7 and 1.
1 can only be divided by 1 and nothing else.
Trust me I should know. People in my school always think 1 is a prime number. But believe me IT'S NOT!!!!!

no it isnt, a prime number is a number that one and itself goes into, two numbers have to go into it and only one does. if that made sense but no it isnt in any case.

Yes,one is a prime number. Two and three are also prime,the only sequence of three prime numbers in a row,two is the only even prime.

Yes.