Forum: Factoring
2013-06-19, 14:31
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Replies: 1,811
Views: 140,683
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Forum: Puzzles
2013-05-16, 15:50
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Replies: 8
Views: 1,268
Thx for your postet solutions, this is an...
Thx for your postet solutions, this is an interesting approach to solve this problem.
The "generic" method (which also works for prime denominators) is to choose a smooth number k which factors...
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Forum: Puzzles
2013-05-12, 14:16
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Replies: 8
Views: 1,268
An Egyptian Fraction
Write \frac{99}{10001} as a sum of distinct unit fractions (all numerators are 1), where all denominators are smaller than 10001. :smile:
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Forum: Factoring
2013-05-05, 15:16
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Replies: 1,811
Views: 140,683
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Forum: Factoring
2013-05-03, 19:04
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Replies: 1,811
Views: 140,683
A lucky ECM result after 6 months:
...
A lucky ECM result after 6 months:
10^236+9^236 prp67 factor: 2970502746365749876818923808989713022319848931047956587856682374457
B1 = 11e7
sigma = 1323877938
group order = 2^2 * 3^4 * 5 *...
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Forum: Factoring
2012-11-22, 16:30
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Replies: 1,811
Views: 140,683
A new ECM factor: ...
A new ECM factor:
675353281583190606094335948707995673045348275372668260771 | 10^209 + 3^209
I have to check ~10 composites first before I find a factor with B1=11e7. So I guess the remaining 500...
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Forum: Factoring
2012-06-28, 16:24
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Replies: 1,811
Views: 140,683
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Forum: Factoring
2012-06-05, 15:49
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Replies: 1,811
Views: 140,683
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Forum: Factoring
2012-05-25, 09:29
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Replies: 1,811
Views: 140,683
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Forum: GMP-ECM
2012-01-13, 11:36
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Replies: 469
Views: 75,161
Could you please compare that with my...
Could you please compare that with my core2-binary (link (http://www.kay-schoenberger.de/eng/math/ecm/binaries/ecm64_win64_core2.zip)) on your i7, I only have a core2, but the timings for stage 2...
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Forum: GMP-ECM
2010-10-02, 19:40
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Replies: 469
Views: 75,161
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Forum: GMP-ECM
2010-09-16, 21:09
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Replies: 469
Views: 75,161
A binary optimised for Intel Core i7/i5/i3...
A binary optimised for Intel Core i7/i5/i3 processors: ecm63_win64_corei (http://www.kay-schoenberger.de/eng/math/ecm/binaries/ecm63_win64_corei.zip).
There is no real difference to the core2-builds.
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Forum: GMP-ECM
2009-09-27, 17:02
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Replies: 76
Views: 7,963
A configuration with
./configure...
A configuration with
./configure --with-gmp=/home/andreas/GMP/gmp-4.3.1
requires two directories /include and /lib which contain the header file and the library:
...
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Forum: Factoring
2009-09-17, 20:40
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Replies: 1,811
Views: 140,683
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Forum: Factoring
2009-06-06, 17:35
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Replies: 1,811
Views: 140,683
Pick a number listed on the reservation page: ...
Pick a number listed on the reservation page:
http://www.chiark.greenend.org.uk/ucgi/~twomack/homcun.pl
These numbers have been extensively ecm'ed. If you run some curves, then I would recommend...
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Forum: Factoring
2009-05-25, 21:46
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Replies: 27
Views: 3,802
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Forum: GMP-ECM
2009-05-09, 12:04
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Replies: 469
Views: 75,161
They are optimised for Core2 and won't run on...
They are optimised for Core2 and won't run on Pentium4. It seems that gmp 4.3.0 uses some new cpu instructions which come along with Core2 (maybe sse4?). You could try this Pentium M binary...
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Forum: GMP-ECM
2009-05-04, 13:20
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Replies: 51
Views: 8,888
I have added a stand-alone parser (see parser.c)...
I have added a stand-alone parser (see parser.c) which accepts every valid combination of the following characters: '0', ..., '9', ' ', '(', ')', '!', '^', '/', '*', '-', '+'
Now it should be...
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Forum: GMP-ECM
2009-04-29, 09:56
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Replies: 13
Views: 1,613
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Forum: GMP-ECM
2009-04-28, 08:15
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Replies: 469
Views: 75,161
Another binary, built with
./configure...
Another binary, built with
./configure --with-gmp=/local --enable-sse2 --build=pentium4
ecm623_win32_2.zip (http://www.kay-schoenberger.de/eng/math/ecm/binaries/ecm623_win32_2.zip)
This seems...
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Forum: GMP-ECM
2009-04-27, 18:03
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Replies: 469
Views: 75,161
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Forum: GMP-ECM
2009-04-26, 20:45
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Replies: 469
Views: 75,161
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Forum: GMP-ECM
2009-04-15, 11:18
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Replies: 469
Views: 75,161
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Forum: GMP-ECM
2009-04-15, 08:35
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Replies: 31
Views: 2,687
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Forum: GMP-ECM
2009-04-07, 15:32
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Replies: 469
Views: 75,161
@smh:
Could you please post this binary and/or...
@smh:
Could you please post this binary and/or compare it with my 64-bit binary (http://www.kay-schoenberger.de/eng/math/ecm/binaries/ecm621_lin64.tar.gz)?
I found binaries optimised for Athlon64...
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