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Old 2021-03-10, 03:11   #1805
axn
 
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Code:
M3896351 has a factor: 623156986806917144446428743177311121238033821208621841 (P-1, B1=15000000, B2=750000000)
623156986806917144446428743177311121238033821208621841 = 50056000151283039160199 x 12449196598281221990483347809959

Interestingly, both factors are B1-smooth.
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Old 2021-03-10, 09:06   #1806
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Have you skipped stage 1 GCD?
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Old 2021-03-10, 11:03   #1807
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Yes, with the intent to find maximum number of factors for the effort spent.
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Old 2021-03-11, 12:15   #1808
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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!
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Old 2021-03-11, 12:20   #1809
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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.
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Old 2021-03-11, 13:13   #1810
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Quote:
Originally Posted by kruoli View Post
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)
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Old 2021-03-12, 16:23   #1811
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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?
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Old 2021-03-12, 17:04   #1812
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Quote:
Originally Posted by storm5510 View Post
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.
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Old 2021-03-12, 17:05   #1813
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Quote:
Originally Posted by axn View Post
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.
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Old 2021-03-15, 16:20   #1814
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Quote:
Originally Posted by axn View Post
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?
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Old 2021-03-15, 17:01   #1815
Viliam Furik
 
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Quote:
Originally Posted by storm5510 View Post
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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