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Old 2016-04-06, 08:03   #100
Sergei Chernykh
 
Jun 2015
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Compression works now. If you force-update submission form to get the updated page and submit your files, you should see something like this in the output:
Quote:
Inflated 81700 to 262099 bytes in 3.780 ms
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Old 2016-04-06, 09:06   #101
R. Gerbicz
 
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"Robert Gerbicz"
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Quote:
Originally Posted by Sergei Chernykh View Post
Compression works now. If you force-update submission form to get the updated page and submit your files, you should see something like this in the output:
Thanks, now it is really faster! My most recent submission's verification+upload took (roughly) 578 seconds.
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Old 2016-04-06, 09:10   #102
Sergei Chernykh
 
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Quote:
Originally Posted by R. Gerbicz View Post
Thanks, now it is really faster! My most recent submission's verification+upload took (roughly) 578 seconds.
You can also do up to 6 parallel submissions (in 6 tabs) in Chrome to utilize 100% of your upload bandwith.
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Old 2016-04-06, 09:46   #103
R. Gerbicz
 
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Quote:
Originally Posted by Sergei Chernykh View Post
You can also do up to 6 parallel submissions (in 6 tabs) in Chrome to utilize 100% of your upload bandwith.
Basically yes, but in general I upload only up to 3 such large file, since each of this 190 MB file needs approx. 350 MB of Ram in Google Chrome.
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Old 2016-04-06, 17:01   #104
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The
a=211503116810
u=33181618540257457180379732920044712802112835201
breeder (my own find) has given 6860987 amicable pairs (already submitted), but the world record is better.
In generating the relevant number sigma(a)/a*sigma(u)^2 has more than 195 billion divisors.

I've found ~15000 breeders, still generating APs using them. Note that in this run I'm not checking the previously known breeders (or in special case the (i,1) type of amciable pairs), so you can still submit them. However as my db is not the most recent one there could be and in fact there is an overlap (but this gives also that not all of my AP is new, though most of them is really new). In that run I've found "only" ~75 new (i,1) type of amicable pair.
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Old 2016-04-06, 17:14   #105
Sergei Chernykh
 
Jun 2015
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Quote:
Originally Posted by R. Gerbicz View Post
The
a=211503116810
u=33181618540257457180379732920044712802112835201
breeder (my own find) has given 6860987 amicable pairs (already submitted), but the world record is better.
In generating the relevant number sigma(a)/a*sigma(u)^2 has more than 195 billion divisors.

I've found ~15000 breeders, still generating APs using them. Note that in this run I'm not checking the previously known breeders (or in special case the (i,1) type of amciable pairs), so you can still submit them. However as my db is not the most recent one there could be and in fact there is an overlap (but this gives also that not all of my AP is new, though most of them is really new). In that run I've found "only" ~75 new (i,1) type of amicable pair.
The record breeder I found is this one:
Code:
a=2^3*31^2*83*101*331*11383
u=73*7129*25450786684907*68383673694179*905743266226565715439297669731703*39841744110809900189228546018528439906893321189767
S(u)*(u+S(u)-1) (which is the same as S(a)/a*S(u)^2 for breeders) has 4339109476800000 divisors - yes, it's ~4.33*1015!!! This breeder alone can generate over one billion pairs, but I haven't even started processing it yet because it would take ages. Anyone is welcome to try it however

P.S. Actually, it has even more divisors, I just don't count odd-even cases (D is even, u/D is odd) which never produce amicable pairs.

Last fiddled with by Sergei Chernykh on 2016-04-06 at 17:26
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Old 2016-04-11, 07:46   #106
Sergei Chernykh
 
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There are over one billion amicable pairs known now! Awesome!
Quote:
Total known amicable pairs: 1,000,108,723
P.S. Almost run out of space on the server to store all those pairs :)
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Old 2016-04-11, 09:40   #107
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Quote:
Originally Posted by Sergei Chernykh View Post
There are over one billion amicable pairs known now! Awesome!


P.S. Almost run out of space on the server to store all those pairs :)
Congratulations !
That's incredible !
More than 700 000 000 amicable pairs in only 10 days !!!
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Old 2016-04-11, 09:50   #108
Sergei Chernykh
 
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Quote:
Originally Posted by garambois View Post
Congratulations !
That's incredible !
More than 700 000 000 amicable pairs in only 10 days !!!
I've found this line in server logs: "2016-04-04 12:04:03.831 Line 126: Database loaded, 314531011 numbers". So it actually took only one week, not 10 days. But I also spent a few weeks before that to find a lot of new breeders.

Next step is to double-check all these pairs and update compressed files for download.

Last fiddled with by Sergei Chernykh on 2016-04-11 at 09:51
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Old 2016-04-11, 10:39   #109
DiegoAlonso
 
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Quote:
Originally Posted by Sergei Chernykh View Post
There are over one billion amicable pairs known now! Awesome!


P.S. Almost run out of space on the server to store all those pairs :)
Congratulations!!!
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Old 2016-04-12, 09:24   #110
R. Gerbicz
 
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"Robert Gerbicz"
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Quote:
Originally Posted by Sergei Chernykh View Post
Next step is to double-check all these pairs and update compressed files for download.
Are there any problems with the database?? When trying to download the large c2 files, say the 120 digits, then c2_120_1.txt and c2_120_2.txt is empty, c2_120_3.txt looks like good (its size is 252 MB), here killed the download. Similar problem for 110 digits: c2_110_1.txt and c2_110_2.txt is empty.

For me the download time was normal (3-4 minutes) for each of these files, so maybe only the generating part was broken?
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