20201120, 14:42  #45  
"Ed Hall"
Dec 2009
Adirondack Mtns
3^{3}·131 Posts 
Quote:
Quote:
On a somewhat related issue, can anyone untar the .bz2 files generated on the Downloads page? I tried List of 1.000 randomly chosen, small composite numbers and I can't open the file with anything. I just get errors. Similarly, can several factorizations be uploaded at once instead of individually? 

20201120, 15:15  #46 
"Oliver"
Sep 2017
Porta Westfalica, DE
2×7×29 Posts 
The .bz2 file is not in tar format. It is pure bzip2. 7zip opens it just fine!
The report page enables you to upload multiple things at once; I'm not quite sure about the format. I guess something like number = factor1 * ... * factorN, one number per line? Last fiddled with by kruoli on 20201120 at 15:26 Reason: Typo. 
20201120, 15:45  #47  
"Ed Hall"
Dec 2009
Adirondack Mtns
3^{3}·131 Posts 
Quote:
As to the report, I haven't tried a multiple line upload yet, but I hope to soon. Thanks! 

20201120, 17:04  #48 
Sep 2009
2^{3}·13·19 Posts 
There have been a load of a few thousand digit numbers added to factordb recently. When factordb tries to factor them it runs ECM, which often finds a composite factor which is the product of most of the smallish factors of the number. That's probably the source of most of the small numbers with many factors.
And the reason why there are over 121000 PRPs under 3000 digits! Try picking a few and clicking "More information" to see what it's a factor of and following the chain. That should show you where stuff is being added now. Chris 
20201120, 20:01  #49  
Jul 2018
31 Posts 
Quote:
I realize this probably increases the load on factordb since for small composites the cofactor is often under the 19digit autofactor threshold. But it seems to result in a higher clearance rate. The incentive is a little perverse? Last fiddled with by penlu on 20201120 at 20:07 

20201120, 22:57  #50  
"Ed Hall"
Dec 2009
Adirondack Mtns
3^{3}×131 Posts 
Quote:
Quote:
I'm also running Colab sessions and don't worry about them because they are only single threaded and unique IP'ed. All of my scripts presently do the full circle of retrieve composite  factor  return results  repeat. But, I plan to look into retrieving several, factoring all and returning all at once. I'm not sure there's a method for larger composites, though. They may have to be retrieved one at a time if you want randomness. 

20201121, 16:56  #51  
Sep 2009
2^{3}·13·19 Posts 
Quote:
But several Colab sessions working at once sounds very nice. Thank you. Chris 

20201121, 17:31  #52  
"Ed Hall"
Dec 2009
Adirondack Mtns
6721_{8} Posts 
Quote:
But, I have added a Colab PARI/GP thread, based on the earlier posted script* to the forum at: How I Create a Colab Session That Factors factordb Small Composites with PARI/GP I have some of these running with larger "totalrun" values. Being singlethreaded, they don't seem to be bumping the limits. But, I added number checking to (hopefully) alleviate any such overruns. *If anyone is running the earlier posted (in this thread) script, they should copy it again. I found and fixed a bug in the original script and edited it in the original post. 

20201123, 22:43  #53 
"Ed Hall"
Dec 2009
Adirondack Mtns
110111010001_{2} Posts 
I factored just over 12k small primes out of the digit sizes for 92 through 97 so far today. Despite that 12k composites were removed, the region GREW by nearly 3k!
However, <91 briefly looks better. . . 
20201124, 02:53  #54 
"Rich"
Aug 2002
Benicia, California
2^{2}·3^{3}·11 Posts 
I ran another i3 core on the C28's yesterday and factored about 12k also.

20201125, 23:31  #55 
"Rich"
Aug 2002
Benicia, California
2^{2}·3^{3}·11 Posts 
Restarted another i3 core on C28's.

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