They are 13 and 19
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13 and 19.
They are 13 and 19 which are prime numbers
The composite numbers between 11 and 19 are: 12 14 15 16 18 The other numbers, 11, 13, 17, and 19, are all prime.
Here are the first 16 prime numbers: 2 3 5 7 11 13 17 19 23 29 31 37 41 43 47 53.
12, 14, 15, 16, and 18 are composite numbers 11, 13, 17, and 19 are prime numbers