How To Determine If A Larger Number Is Prime Or Composite

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Uploaded by on Aug 15, 2009

In this video, we use the first 15 prime numbers to determine if a significantly larger number is prime or composite.

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Howto & Style

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Uploader Comments (toddlusk)

  • thanks. i understand the concept now.

  • @binasheikh1974 Glad I could help.

  • thnx

  • You're quite welcome.

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All Comments (5)

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  • You don't need to test 37, since you know the sq rt is 32, if the number was divisible by any number above 32 it would also be divisible by a number below 32 and therefore you would already have determined it was not prime.

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