A Prime number is divisible only by 1 and itself.
Some examples would include:
2,3,5,7,11,13,53, and 97.
This is not an exhaustive list.
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Here are some examples. EX:2,3,7,11,13,19 Prime numbers are numbers that are only divided by themselves and one. So any number that can only be divided by 2 other numbers or less is a prime number!
Any number that is not a prime number.. . .Prime numbers: 1,3,5 and 7
Just 2.
All numbers that only have one and itself as factors are prime. Therefore, to tell if a number is prime simply find it's factors. If it have more than two factors than it is not a prime number.
All numbers have factors. Some numbers have only two factors, the number one and the number itself. These are known as prime numbers. 7 has two factors: 1 and 7. 7 is a prime number.