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Old 2021-01-04, 14:54   #4
UBR47K
 
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Aug 2015

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I'm noticing a small speed decrease with ECM on M1277 (even with PracSearch=1) compared to 30.3b6 on Haswell i5.

Can someone confirm this? (I'm using OutputIterations=30000000)
30.3b6:
Code:
M1277 curve 2 stage 1 at prime 4520437637 [59.47%]. Time: 9.504 sec.
M1277 curve 2 stage 1 at prime 4522699141 [59.50%]. Time: 9.598 sec.
30.4 with PracSearch=1 (default gives around 10.xxx sec)
Code:
M1277 curve 1 stage 1 at prime 178990073 [2.35%]. Time: 9.711 sec.
M1277 curve 1 stage 1 at prime 181260257 [2.38%]. Time: 9.712 sec.
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