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Old 2015-10-17, 20:25   #2
I moo ablest echo power!
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May 2013

174110 Posts

GPU-ECM uses the CPU for stage 2. It uses the gpu (with flag -gpu) for stage 1 only. The GPU-enabled stage 1 is also limited to numbers less than or equal to 2^1018-1 for the time being.
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