2 3 5 7 11 13 17 19.
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They are 2 and 17 = 19 which is also a prime number
43 and 19
The prime numbers up to 25 are 2, 3, 5, 7, 11, 13, 17, 19, and 23.
2 3 5 7 11 13 17 19 23 29 they are all prime numbers
2 3 5 7 11 13 17 19 23 29.