20100921, 01:06  #892 
Feb 2005
2^{2}×3^{2}×7 Posts 
Here is a new version that supports both msieve and yafu:
Code:
#!/usr/bin/perl use strict; print("FactorDB Helper 1.5\n"); # wget executable my $wget = "wget nocheckcertificate"; # msieve and/or yafu executables my $msieve = "/home/maxal/libs/msieve/msieve/trunk/msieve t 3"; my $yafu = "/home/maxal/libs/yafu1.19.2/yafu"; # "M" for msieve, "Y" for yafu my $MorY = "Y"; # min and max number of digits to factor my $mindig = 65; my $maxdig = 100; $ = 1; $/ = undef; while(1) { my @todo; # getting 100 random unfactored numbers $_ = `$wget O  "http://factordb.com/getrandom.php?n=100&t=3&mindig=$mindig&maxdig=$maxdig"`; # getiing 100 smallest unfactored numbers #$_ = `$wget O  "http://factordb.com/listtype.php?t=3&scriptmode=1"`; while( /(\d{19})\s(\d+)/gs ) { # /<a href=\"index\.php\?id=([^\"]*)\"><font color=\"\#002099\">([^<]*)<\/font><\/a><sub><(\d+)><\/sub>/gs ) { my $id = $1; my $digits = $2; if( ($digits >= $mindig) && ($digits <= $maxdig) ) { push(@todo,$id); } } print("Todo size: ",scalar(@todo),"\n"); if( scalar(@todo) == 0 ) { print("No suitable numbers. Resting for a while.\n"); sleep 60; next; } shuffle(@todo); foreach (@todo) { my $id = $_; # checking status and getting the number in decimal $_ = `$wget O  http://factordb.com/getnumber.php?id=$id`; if( ! /(\S+)\s(\d+)/ ) { print("Error 1\n"); sleep 60; next; } if( $1 ne "C" ) { print("\nid=$id has known factors.\n\n"); next; } my $number = $2; my $digits = length($number); print("Factoring $digitsdigit number (id=$id)\n"); my $factor = 0; if( $MorY eq "M" ) { # factoring with msieve if( $digits >= 80 ) { $_ = `$msieve v n $number`; } else { $_ = `$msieve v $number`; } if( /prp\d+ factor: (\d+)\s/s ) { $factor = $1; } } if( $MorY eq "Y" ) { #factoring with yafu $_ = `$yafu "factor($number)"`; if( /PRP\d+ = (\d+)\s/s ) { $factor = $1; } } if( $factor == 0 ) { print("Error 2\n"); sleep 60; next; } # reproting the factor print("\nFactor found: $factor\n\n"); $_ = `$wget postdata "report=$factor&format=0" O  http://factordb.com/index.php?id=$id`; } } exit; sub shuffle { for (my $i = 0; $i < @_; $i++) { my $j = rand(@_  $i) + $i; # pick random element ($_[$i], $_[$j]) = ($_[$j], $_[$i]); # swap 'em } } Last fiddled with by maxal on 20100921 at 01:07 
20100921, 01:17  #893 
Apr 2010
Over the rainbow
9E1_{16} Posts 
So far, Yafu seem a bit quicker, so I stay with it.

20100921, 13:36  #894 
Mar 2006
Germany
13^{2}×17 Posts 
Here's a slightly changed version of Syd's script (uses only yafu, here WIN) Version 1.4.1.
Changes:  logging on screen lists only numbers (with FactorDBid and decimal representation) and factors found  same logging in file 'log.txt'  only one number is selected with "getrandom.php" not 100  changing the digitrange for factoring on the fly:  if no number was found in the range of 65 to 75 digits (default) the max range border is increased by 1  if 5 numbers were tested in a row of the same digitrange, the max border is decreased by 1 The output looks like this: Code:
Decreasing range to 6573 digits. Factoring C72, id=1100000000215417418 107698193083421293260516846795731434061232959793477539564812373340276287 Factors: 26405284013285459123374233622798414903151 4078660658572519568543061554737 Factoring C71, id=1100000000215417870 28504080459937869696853196518741764601588734850800683566672894693639223 Factors: 1748688300560557 16300263718125547456234420973318896388823562351146807539 Increasing range to 6574 digits. Increasing range to 6575 digits. Increasing range to 6576 digits. Factoring C76, id=1100000000025315182 1974478705750231792145699016077046904574325297781281987720170399119810269059 Factors: 29295408896033352638313544033 67398912667765477451991694259949184848483041123 Note: First I used wget 1.8.2 from a UnixUtils package to run that script under WIN, but that version does not support dataupload with the "postdata" option. So I searched for another version, comes with gawk.exe but without some needed DLL's. That 'wget.exe' needs libeay32.dll, libiconv2.dll, libintl3.dll and libssl32.dll. After I found them, it's working great now. I've changed the extension of the attached file into *.txt, rename to *.pl again. 
20100921, 17:12  #895 
Mar 2007
Germany
2^{3}×3×11 Posts 
Thank you kar bon !
Now i have a other wget.exe with .dll`s and it`s running for me too. I was wondering me why the factors are not submitted before. Now it works fine. Thanks again. Regards Andi_HB 
20100922, 12:24  #896 
Sep 2008
Krefeld, Germany
2·5·23 Posts 
I made a small change so you dont need to "POST" the factors anymore, simple "GET" will do now, too.

20100922, 12:36  #897 
Mar 2007
Germany
2^{3}×3×11 Posts 
Syd you don`t want to increase the Smallest unproven prime from 1000 digits to 2000 digits or more? There are only 8450 Unproven (probable) primes in the List.

20100922, 12:53  #898  
Sep 2008
Krefeld, Germany
2×5×23 Posts 
Quote:
Btw.: Whats the best/fastest tool to use for primality proving? 

20100922, 13:14  #899 
Mar 2006
Germany
13^{2}·17 Posts 
The (few minutes ago) unproven 1000digit number 10^999+7:
Here are different callings with pfgw V3.3.6: Code:
>pfgw l t q"10^999+7" PFGW Version 3.3.6.20100908.Win_Stable [GWNUM 25.14] Output logging to file pfgw.out Primality testing 10^999+7 [N1, BrillhartLehmerSelfridge] Running N1 test using base 5 Calling BrillhartLehmerSelfridge with factored part 0.51% 10^999+7 is PRP! (0.1865s+0.0033s) Code:
>pfgw l tp q"10^999+7" PFGW Version 3.3.6.20100908.Win_Stable [GWNUM 25.14] Output logging to file pfgw.out Primality testing 10^999+7 [N+1, BrillhartLehmerSelfridge] Running N+1 test using discriminant 5, base 1+sqrt(5) Calling BrillhartLehmerSelfridge with factored part 1.30% 10^999+7 is Lucas PRP! (0.4724s+0.0021s) Code:
>pfgw l tc q"10^999+7" PFGW Version 3.3.6.20100908.Win_Stable [GWNUM 25.14] Output logging to file pfgw.out Primality testing 10^999+7 [N1/N+1, BrillhartLehmerSelfridge] Running N1 test using base 5 Running N+1 test using discriminant 13, base 1+sqrt(13) Calling N+1 BLS with factored part 1.30% and helper 0.51% (4.46% proof) 10^999+7 is Fermat and Lucas PRP! (0.5927s+0.0022s) Using a helper file with the factors of N1 and N+1: Code:
2 139 557 3 7 29 25243 44267 93199469863 16622228274680328721 129828685855865750907048113732006068712091646588660399057028288891675878011928140341693521730335952497241789568992132121979762823763531070211612968223909822033434002496345971636586658440721130839012689196098180606762153068539938809143782413354282490083035830899694616965129832580716441426879575325175418028894153009338058058869 gives: Code:
>pfgw l tc hfact.txt q"10^999+7" PFGW Version 3.3.6.20100908.Win_Stable [GWNUM 25.14] Output logging to file pfgw.out Primality testing 10^999+7 [N1/N+1, BrillhartLehmerSelfridge] Reading factors from helper file fact.txt Running N1 test using base 5 Running N+1 test using discriminant 13, base 1+sqrt(13) Calling N+1 BLS with factored part 36.98% and helper 0.51% (111.48% proof) 10^999+7 is prime! (0.8895s+0.0023s) Last fiddled with by kar_bon on 20100922 at 13:16 
20100922, 13:29  #900  
Account Deleted
"Tim Sorbera"
Aug 2006
San Antonio, TX USA
17×251 Posts 
Quote:
Code:
h Factor Helper file An argument is required for this switch. Use this option when you are using the n1 or n+1 test and run short of small factors to get to the 33.33% limit. If you have found larger factors with other programs (ecm, rho, whatever) you can put them in the helper file one on a line. You should ONLY use prime factors in this file, or the result is invalid. The file can also be made up of expressions, and not simply numbers Example: pfgw tp hhelper.txt When testing (t tp tm tc) any factor in this file that is not part of the N1 or N+1 (either or both depending upon which method of testing), will be printed to screen with a warning listing that this factor does not "fit". (Note this behavior can be overridden by using the HideNoFactor=true in the pfgw.ini file) Multiple h command line switches can be used (for multiple factor files). Example pfgw tc hplus hminus input_file Code:
WinPFGW ran with "tc hhelper.txt q10^999+7" PFGW Version 3.3.6.20100908.Win_Stable [GWNUM 25.14] Output logging to file pfgw.out Primality testing 10^999+7 [N1/N+1, BrillhartLehmerSelfridge] Reading factors from helper file helper.txt Running N1 test using base 5 Special modular reduction using allcomplex FFT length 192 on 10^999+7 Running N+1 test using discriminant 13, base 1+sqrt(13) Special modular reduction using allcomplex FFT length 192 on 10^999+7 Calling N+1 BLS with factored part 4.34% and helper 0.51% (13.53% proof) 10^999+7 is Fermat and Lucas PRP! (0.0888s+0.0404s) For this particular number, I have already ran a primality test with Primo. The certificate is attached. The test took about 21 minutes. The verification takes about 0.03 seconds. As far as I know, and without having N1 or N+1 easily factored to 33.33% of the size of N, this is the fastest way to prove primality for numbers this size. Last fiddled with by MiniGeek on 20100922 at 13:32 

20100922, 13:37  #901  
Mar 2006
Germany
13^{2}×17 Posts 
Thanks, not read that part.
Quote:


20100922, 14:20  #902  
Account Deleted
"Tim Sorbera"
Aug 2006
San Antonio, TX USA
17×251 Posts 
Quote:
The applet: Code:
Factorization complete in 0d 0h 14m 25s ECM: 0 modular multiplications Prime checking: 5552675 modular multiplications Timings: Primality test of 1 number: 0d 0h 14m 21.2s Code:
[Running Times] Initialization=0.48s 1stPhase=19mn 30s 2ndPhase=5mn 50s Total=25mn 21s Last fiddled with by MiniGeek on 20100922 at 14:20 

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