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Re^6: Algorithm for cancelling common factors between two lists of multiplicandsby BrowserUk (Patriarch) |
| on Aug 10, 2005 at 23:08 UTC ( [id://482802]=note: print w/replies, xml ) | Need Help?? |
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For numbers near 2**32, factoring a prime number seems to take 150 times longer I'm not sure that I understand this? Factoring a prime how? (I should also admit that I don't know what a "n-order wheel" is, or why it would benefit me to use one :) Also, as I'm limiting my inputs to 0 .. 2**32, I only need the primes upto 65537 in order to factor that range of inputs. Right now, I am trading a little space (130k) to gain speed by building an array of the first 6534 primes at compile time. Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
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