2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, and 71
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list the prime numbers between one and twenty
There are 12 composite (and 8 primes) in the first twenty whole numbers. So the probability of randomly choosing a non-prime is 12/20 or 60%.
11 + 11 = 22
The first three prime numbers are 2,3 and 5.
The sum of the first 25 prime numbers is 1,060.