1, 3, 5, 7, 11, 13, 17, 19, 23, 27, 29, 31, 37, 41, 43, 47, 51, 53, 57, 59
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The first 20 prime numbers in order are: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71.
The first two consecutive prime numbers that have a difference of 20 are the numbers 887 and 907.
23, 29 & 31.
The prime factors of 20 are 2x2x5.
The prime numbers of 20 are 2, 2 and 5. (2*2*5 = 20)
The prime numbers between 20 and 30 are 23 and 29.