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Old 2021-04-25, 16:23   #1
ATH
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Dec 2003
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Default P+1 test is also P-1 ?

The new P+1 test in Prime95 is also finding P-1 factors. 4 of the 8 factors found so far are P-1 smooth within B1/B2 and NOT P+1 smooth:
https://mersenneforum.org/showpost.p...&postcount=199

Will P+1 test in GMP-ECM also find P-1 smooth factors? I never read anything about this before, I thought it was a special extra feature George added to his P+1 test, that it was taking more time to include P-1 as well.

If yes will P-1 smooth factors only be found by half the seeds x0 same as P+1 smooth factors? (In a P+1 test).

https://mersenneforum.org/showpost.p...&postcount=230

Last fiddled with by ATH on 2021-04-25 at 16:24
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