5, 7, 11, 13, 17, and 19; plus 3 if you are including it.
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The numbers 2, 3, 5, 7, 11, 13, 17 and 19 are prime.
3 5 7 11 13 17 19.
2 3 5 are prime numbers.
2, 3, 5, 7, 11, 13, 17 and 19.
The prime numbers 0-20 are 2, 3, 5, 7, 11, 13, 17, and 19.