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 2021-03-10, 03:11 #1805 axn     Jun 2003 25×5×31 Posts Code: M3896351 has a factor: 623156986806917144446428743177311121238033821208621841 (P-1, B1=15000000, B2=750000000) 623156986806917144446428743177311121238033821208621841 = 50056000151283039160199 x 12449196598281221990483347809959 Interestingly, both factors are B1-smooth.
 2021-03-10, 09:06 #1806 kruoli     "Oliver" Sep 2017 Porta Westfalica, DE 2×13×19 Posts Have you skipped stage 1 GCD?
 2021-03-10, 11:03 #1807 axn     Jun 2003 25×5×31 Posts Yes, with the intent to find maximum number of factors for the effort spent.
 2021-03-11, 12:15 #1808 axn     Jun 2003 25·5·31 Posts As if to prove my point: Code: M3897389 has a factor: 45181493770845059783464463031892083814410916646456447555354707802319544943 (P-1, B1=15000000, B2=750000000) The composite splits as 29328238810511654808943052108623 x 1540545753966357318407650279153419100591841 The smaller one is a B1-only factor, whereas the larger one is a B2 factor. Incidentally, the larger one is 140.1 bits and will slot in at #28 in the list -- my second biggest!
 2021-03-11, 12:20 #1809 kruoli     "Oliver" Sep 2017 Porta Westfalica, DE 2×13×19 Posts Congratulations! I did not want to judge you with your reasoning in my last post. We would call something like that figuratively "Kaventsmann" in German.
2021-03-11, 13:13   #1810
axn

Jun 2003

10011011000002 Posts

Quote:
 Originally Posted by kruoli Congratulations! I did not want to judge you with your reasoning in my last post.
FWIW, I didn't interpret it as being judgemental.

It is just that, it was too funny that as soon as I explained my reasoning, I got an example. In the past 10 months or so running deep P-1, I don't think I have seen this situation occur (a mix of stage1 & stage 2 factors being found together)

2021-03-12, 16:23   #1811
storm5510
Random Account

Aug 2009

111100101012 Posts

Quote:
 Originally Posted by axn573323 45181493770845059783464463031892083814410916646456447555354707802319544943
74 digits, if I counted correctly. Quite impressive. If I may ask, what did you run this with and how long did it take?

2021-03-12, 17:04   #1812
axn

Jun 2003

115408 Posts

Quote:
 Originally Posted by storm5510 74 digits, if I counted correctly. Quite impressive. If I may ask, what did you run this with and how long did it take?
1 core on a Ryzen 5 3600 (running in Eco mode). Took about 8.5 hours, running mprime 30.4. Allocated about 4GB of memory.

2021-03-12, 17:05   #1813
James Heinrich

"James Heinrich"
May 2004
ex-Northern Ontario

22·839 Posts

Quote:
 Originally Posted by axn Incidentally, the larger one is 140.1 bits and will slot in at #28 in the list -- my second biggest!
Sorry about that, because your composite factor was >200 bits it broke out of my automated factoring code and while I remembered to delete the composite from the records table I forgot to put your prime factors back in.
I have done so now, and indeed the larger of the two is at #28 in the top P-1 factors, and #2 for top axn factors.

2021-03-15, 16:20   #1814
storm5510
Random Account

Aug 2009

79516 Posts

Quote:
 Originally Posted by axn 1 core on a Ryzen 5 3600 (running in Eco mode). Took about 8.5 hours, running mprime 30.4. Allocated about 4GB of memory.
My son has a Ryzen 5 3600. 6 cores / 12 threads. Why only one core?

2021-03-15, 17:01   #1815
Viliam Furik

"Viliam Furík"
Jul 2018
Martin, Slovakia

23·3·19 Posts

Quote:
 Originally Posted by storm5510 My son has a Ryzen 5 3600. 6 cores / 12 threads. Why only one core?
Those small exponents give the highest throughput when you set it to 6 workers, 1 core per worker.

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