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dhemmy
Group Title
how do you test for primality in java. and if the input is not prime how do you output the product
 one year ago
 one year ago
dhemmy Group Title
how do you test for primality in java. and if the input is not prime how do you output the product
 one year ago
 one year ago

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MakaiMcClintock Group TitleBest ResponseYou've already chosen the best response.1
Use the modulus (%) operator. If 0 the number is even, if not it is odd. Discard number if even (and not 0, depending on how you look at it), then for all odd numbers write a recursive method that breaks down the number into its factors
 one year ago

oldrin.bataku Group TitleBest ResponseYou've already chosen the best response.0
For primality there are many different sieves that allow one to find prime numbers up to a given number; you can just use trial division and see if any of these divide your given number.
 one year ago

oldrin.bataku Group TitleBest ResponseYou've already chosen the best response.0
http://en.wikipedia.org/wiki/Primality_test#Naive_methods
 one year ago
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