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2013-08-17, 09:48
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#12 |
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Tribal Bullet
Oct 2004
67258 Posts |
Well, the next 'level' of ECM would have taken several minutes. Would you have been happier if the whole job took 20+several minutes in return for a chance at needing only several?
This is the dilemma in scheduling ECM+QS. How big would the value of 'several' have to be before you consider it 'paying too much for insurance' that QS not be wasted effort? |
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2013-08-17, 16:09
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#13 |
Sep 2009
2×1,039 Posts |
The rule of thumb is to run ECM for about 1/3 of the time needed for QS or GNFS. So 5-6 minutes ECM would be about right.
The script I'm using now would have run part of T30, varying the number of curves depending how big the number is. Chris |
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2013-08-17, 16:47
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#14 | |
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Bamboozled!
"πΊππ·π·π"
May 2003
Down not across
10,753 Posts |
Quote:
I only ever fire up msieve when I know beyond all reasonable doubt that no factors under 30 digits are to be found. In this situation, spending even a few seconds on ECM is wasted effort. Paul |
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