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Solution
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Solution provided by AtoZmath.com
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Prime numbers from 1 to 1000 calculator
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Example1. prime numbers from 1 to 20Solution:| Number | Factors | Prime or Composite? | | 1 | 1 | neither Prime nor Composite | | 2 | 1,2 | Prime | | 3 | 1,3 | Prime | | 4 | 1,2,4 | Composite | | 5 | 1,5 | Prime | | 6 | 1,2,3,6 | Composite | | 7 | 1,7 | Prime | | 8 | 1,2,4,8 | Composite | | 9 | 1,3,9 | Composite | | 10 | 1,2,5,10 | Composite | | 11 | 1,11 | Prime | | 12 | 1,2,3,4,6,12 | Composite | | 13 | 1,13 | Prime | | 14 | 1,2,7,14 | Composite | | 15 | 1,3,5,15 | Composite | | 16 | 1,2,4,8,16 | Composite | | 17 | 1,17 | Prime | | 18 | 1,2,3,6,9,18 | Composite | | 19 | 1,19 | Prime | | 20 | 1,2,4,5,10,20 | Composite |
Prime numbers : between 1 and 20 2, 3, 5, 7, 11, 13, 17, 19 There are 8 prime numbers between 1 and 20
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