The image added below shows the prime numbers from 1 to 100. the even numbers are not checked even once throughout the process. For example, the first 5 prime numbers are 2, 3, 5, 7, and 11. Why this code performs better than already accepted ones: Prime numbers are numbers that have only 2 factors: 1 and themselves. Checkout the results for different N values in the end. My code takes significantly lesser iteration to finish the job. Using Sieve of Eratosthenes logic, I am able to achieve the same results with much faster speed. How would I need to change this code to the way my book wants it to be? int main () So I did try changing my 2nd loop to for (int j=2 j It mentions something about square root of a number. The first prime number, p 1 2 The second prime number, p 2 3 The third prime number, p 3 5 The fourth prime number, p 4 7 And so on. The n th prime number can be denoted as p n, so. There are 1,009 total prime numbers in the lookup table below. The first student to cross off all the numbers on. The prime numbers table lists the first 1000 prime numbers from 2 to 8011. Such numbers have only 1 as their highest common factor, for example, (4 and 7), (5, 7, 9) are co-prime numbers. There should be a minimum of two numbers to form a set of co-prime numbers. This c++ code prints out the following prime numbers: 3 5 7 11 13 17 19 23 29 31 37 41 43 47 53 59 61 67 71 73 79 83 89 97.īut I don't think that's the way my book wants it to be written. Students then determine if that number is prime or composite and cross it off their list once they find it. Co-prime Numbers Co-prime numbers are pairs of numbers that do not have any common factor other than 1.
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