2,3,5,7,11,13,17,19 some might be wrong not sure just answered because my little sister was asking me what it was
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There are eight prime numbers under 20.
These are the prime numbers 1-20 2,3,5,7,11,13,17,19
Prime Numbers under 6 are 2,3,5
There are 34 prime numbers under 140.
2/5 of the numbers from 1 to 20 are prime numbers