A prime number has exactly two factors, 1 and itself.

Prime numbers 1-100:

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2,3,5,7,11,13,17,19,23,29,31,37,43,47,53,59,61,67,71,73,79,83,89 and 97

The number 1 is neither prime nor composite, as it has only one factor.

## Prime Numbers And Factoring

Related lessons:

Can negative numbers be prime numbers? No. Negative numbers don’t symbolize natural numbers. That means there are no fractions as well.

Can zero be among prime numbers? No. To make a prime number, you need to have two divisors. Whereas zero may be divided by actually any number, you are not able to divide by zero.

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Numbers like six, for example, may be divided by 1, 2, 3, and 6. When you are dividing by these numbers, there is no remainder. A prime number, for example, 7, can be divided by only by 1 and 7 with no remainder.

**Composite numbers**

The opposite of prime numbers are composite numbers. We talked before about how we can divide six by 1, 6, 2, and 3. So we talk about six as a composite number as it can be divided by many different numbers without having a remainder left.

So in conclusion:

Prime numbers have exactly two factors. These are 1 and itself.

Negative numbers cannot be prime numbers. A negative number doesn’t symbolize a natural number.

The number zero can also not be a prime number. For making prime numbers, we require 2 divisors. We can divide zero by any number but we can not divide it by zero.