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Old 2021-04-10, 12:58   #2
charybdis
 
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Apr 2020

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The -B1ecm option only affects ecm(), not factor().

You can use -work to specify how much ECM has already been run on a number: -work 30 would mean that ECM is already complete to the 30-digit level, so factor() would start at the 35-digit level, i.e. B1=1000000.
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