SOLUTION: What is the greatest prime you must consider to test whether 503 is prime?
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Question 416821: What is the greatest prime you must consider to test whether 503 is prime?
Answer by richard1234(7193) (Show Source): You can put this solution on YOUR website!
The square root of 503 is a little more than 22 (but less than 23), so the largest prime lower than the square root of 503 is 19. This is the largest one you'll need to test.
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