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Old 2019-12-13, 23:38   #1
mrh
 
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Default Unlucky factoring?

Since 4-Oct I've completed 195 TF, P1 and ECM runs, totaling over 5,600 ghz-days, with out finding a factor. I'm glad I don't wager in Vegas...
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Old 2019-12-13, 23:43   #2
petrw1
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Quote:
Originally Posted by mrh View Post
Since 4-Oct I've completed 195 TF, P1 and ECM runs, totaling over 5,600 ghz-days, with out finding a factor. I'm glad I don't wager in Vegas...
Hang in there.
My record (and I'm sure I'm not first) is over 500 TF without a factor.
However my lifetime average is about 1/100.
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Old 2019-12-14, 12:31   #3
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Quote:
Originally Posted by mrh View Post
Since 4-Oct I've completed 195 TF, P1 and ECM runs, totaling over 5,600 ghz-days, with out finding a factor. I'm glad I don't wager in Vegas...
In what exponent range?
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Old 2019-12-14, 19:06   #4
mrh
 
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Quote:
Originally Posted by Gordon View Post
In what exponent range?
All over, but mostly from M100m - M200m. I find numbers I like, do some factoring, then a PRP test. Like with 200002007 for example.
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Old 2019-12-14, 20:02   #5
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Quote:
Originally Posted by mrh View Post
Since 4-Oct I've completed 195 TF, P1 and ECM runs, totaling over 5,600 ghz-days, with out finding a factor. I'm glad I don't wager in Vegas...
All of your factoring luck got sucked up and funneled into your PRP luck! :)

https://www.mersenne.org/report_expo...lo=3467&full=1
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Old 2019-12-15, 00:10   #6
mrh
 
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All of your factoring luck got sucked up and funneled into your PRP luck! :)

https://www.mersenne.org/report_expo...lo=3467&full=1
True, I shouldn't complain :)
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Old 2019-12-17, 13:48   #7
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Broke the streak: 133331333 finally :) And such a good looking number, I thought for sure it would be the one...
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Old 2019-12-17, 16:28   #8
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The truth about ECM's. Lifetime, I have found 20 factors in 15,140 attempts. This is 0.13%.
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Old 2019-12-17, 17:26   #9
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Quote:
Originally Posted by storm5510 View Post
The truth about ECM's. Lifetime, I have found 20 factors in 15,140 attempts. This is 0.13%.
IMHO … When it comes to ECM a more accurate measurement is factors per curve.

When I run ECM I will often edit the worktodo.txt and increase the curves to at least 10; sometimes 50 or more.

With that I have an almost 1% success rate.
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Old 2019-12-17, 19:26   #10
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Quote:
Originally Posted by petrw1 View Post
IMHO...With that I have an almost 1% success rate.
For many years, I used what the server gave me. I really did not study the worktodo format until a few years ago. With this in mind, the vast majority of what I ran was three curves. I still do this with my Linux system. I allow mprime to run them as presented. I have ran higher curve counts on my Windows system. Most of these were preps for GMP-ECM. I stopped doing this. GMP-ECM's results format is totally not compatible with Primenet.
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Old 2019-12-17, 22:52   #11
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Default This is beyond believable bad luck

https://www.mersenne.ca/status/tf/0/365/4/90000
1 full year of progress.

900.0 has over 2,000 exponents TF'd from 71 to 80 with 1 factor reported.
We would expect about 200.

900.1 has over 2,000 exponents TF'd from 71 to 80 or 82 with 7 factors reported.
We would expect over 200.

I don't believe the factors were simply reported prior to 1 year ago because the remaining unfactored count is much too high.
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