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Old 2021-09-02, 19:55   #420
SethTro
 
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"Seth"
Apr 2019

18316 Posts
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I missed a comma in a PMinus1 assignment which resulted in only stage one happening (which it completed).
When I added the exponent back with

PMinus1=1,2,21317,-1,30000000000,0,67,2

Code:
[Worker #5 Sep 1 23:29] P-1 on M21317 with B1=30000000000, B2=TBD
[Worker #5 Sep 1 23:29] Using AVX FFT length 1K
[Worker #5 Sep 1 23:29] M21317 stage 1 complete. 0 transforms. Time: 0.887 sec.
[Worker #5 Sep 1 23:29] Stage 1 GCD complete. Time: 0.001 sec.
[Worker #5 Sep 1 23:29] Available memory is 31000MB.
(6 hours to make up it's mind)
[Worker #5 Sep 2 05:36] With trial factoring done to 2^67, optimal B2 is 614891451*B1 = 18446743530000000000.
[Worker #5 Sep 2 05:36] If no prior P-1, chance of a new factor is 41.6%
I've seen 200*B1 and 1000*B1 with ecm but never 614,000,000*B1
Also weird that it took 6 hours to make up it's mind.
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