1, 2, 3 ,5 , and 7 are all prime numbers less than 10. The lower the number is, the more likely it is to be prime. There is only one number, 2, that is even.
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There are only four prime numbers less than 10. They are 2, 3, 5 and 7.
They are 239 prime numbers less than 1500.
There is only one and it is 2
3,9,27,81,243,729
There are 1229 prime numbers that are less than 10000.