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Old 2011-09-23, 14:48   #1
S34960zz
 
Feb 2011

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Default mfaktc TF credit 2x higher if factor found?

I understand that PrimeNet makes various assumptions for CPU credit calculation, and that in the past several months the rules may have been updated (can't find a good existing thread to which to follow up, however).

Using mfaktc and manual assignments / results reporting, I got the following. Note the TF credit was almost 2x when a factor was found (and bit-level search abandoned) than for a similar exponent where no factor was found (and the entire bit-level searched). Is this the "expected" result? Nice bonus for finding a factor, though.
Code:
--------------------
no factor for M55033889 from 2^70 to 2^71 [mfaktc 0.17-Win 71bit_mul24]
M55033907 has a factor: 2289199237566490794617
found 1 factor(s) for M55033907 from 2^70 to 2^71 (partially tested) [mfaktc 0.17-Win 71bit_mul24]
--------------------
Processing result: no factor for M55033889 from 2^70 to 2^71 [mfaktc 0.17-Win 71bit_mul24]
CPU credit is 4.3451 GHz-days.
Mfakto no factor lines found: 0
Factors found: 1
Processing result: M55033907 has a factor: 2289199237566490794617
CPU credit is 8.4929 GHz-days.
--------------------
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Old 2011-09-24, 13:42   #2
Mini-Geek
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No, that's not the expected result. Finding a factor is always less work than searching the whole range, and is expected to give less credit. According to a separate CPU credit estimator, it should have earned about 0.803 GHz-days. Maybe PrimeNet assumed you used P-1?

Last fiddled with by Mini-Geek on 2011-09-24 at 13:42
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Old 2011-09-25, 21:57   #3
James Heinrich
 
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Quote:
Originally Posted by Mini-Geek View Post
According to a separate CPU credit estimator, it should have earned about 0.803 GHz-days.
That is also not an expected result. PrimeNet actually has two formula calculations for TF credit: one is specifically for Prime95, and another one for "other". The factor in question is 70.96 bits, very close to the top end of that range. It would seem that Prime95 searches the range "top-down", such that factors closer to the end of the range are found first, whereas the "other" formula assumes searching from bottom-up and gives a credit of 4.15101481 GHz-days. Both 0.8 and 4.2 could be considered "correct", depending on which search direction was used. But I can't think of a good reason (or even a bad one) that would give 8.49GHz-days credit. P-1 gives 4.29Gd. Giving both P-1+TF credit is close, but still slightly off at 8.44Gd.

Last fiddled with by James Heinrich on 2011-09-25 at 21:58
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Old 2011-09-27, 02:02   #4
Christenson
 
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Primenet doesn't seem to give accurate credit for factors found...but since I find factors infrequently, I don't worry about it since it is a small error in the totals.
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Old 2011-09-28, 01:34   #5
Xyzzy
 
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FWIW:

  • Case 1:
    • Factors are submitted without manipulation. In other words, the results.txt file is uploaded as is. Note the higher credit.
    • Code:
      Manual testing  54793747        F       2011-09-21 21:39        60.2     1888477612651899345649  7.3185
      Manual testing  54050981        F       2011-09-21 21:39        60.2     1228558681068777157049  4.6750
      Manual testing  54050093        F       2011-09-21 21:39        60.2     1438904274093740453719  5.6838
      Manual testing  53967601        F       2011-09-21 21:39        60.2     1205202128657595095369  4.5596
      Manual testing  53910251        F       2011-09-21 21:39        60.2     1861587365294029948999  7.3467
      Manual testing  54692879        F       2011-09-18 20:32        57.2     1370621642639352954223  5.3104
      Manual testing  54594349        F       2011-09-18 20:23        57.2     1272028445382994429961  4.8482
      Manual testing  54232391        F       2011-09-18 20:23        57.2     1591018202278033256617  6.3040
      Manual testing  54227623        F       2011-09-18 20:17        57.2     2027583152901313502879  7.8471
      Manual testing  54146969        F       2011-09-18 20:17        57.2     2357966833734299072081  8.8206
      Manual testing  54049867        F       2011-09-18 20:17        57.2     2289852366710598664823  8.6493
      Manual testing  54038371        F       2011-09-18 18:54        57.1     1552096027458826372111  6.1685
      Manual testing  53963771        F       2011-09-18 18:21        57.1     2147803753352343324239  8.2537
      Manual testing  53960477        F       2011-09-18 18:16        57.1     1488855890998429319447  5.9115
      Manual testing  53480477        F       2011-09-08 01:53        46.4     1691230305200796534553  6.7866
      Manual testing  53472637        F       2011-09-08 01:53        46.4     1237670037405481673473  4.7733
      Manual testing  53388253        F       2011-09-08 01:53        46.4     2012792555142384129511  7.9232
      Manual testing  53300393        F       2011-09-08 01:53        46.4     2245052769951581829553  8.6431
      Manual testing  53131609        F       2011-09-08 01:53        46.4     1335141537443788118753  5.2961
      Manual testing  53121539        F       2011-09-08 01:53        46.4     1624283499972650894473  6.5702
      Manual testing  53989883        F       2011-09-08 01:52        46.4     1182407805848008049033  4.4357
      Manual testing  53978117        F       2011-09-08 01:52        46.4     1943041181561051783647  7.6112
      Manual testing  53971139        F       2011-09-08 01:52        46.4     2278975518929597948791  8.6315
      Manual testing  53955131        F       2011-09-08 01:52        46.4     1595259675519338220113  6.3534
      Manual testing  53946853        F       2011-09-08 01:52        46.4     698603810284128322297   2.7517
      Manual testing  53943623        F       2011-09-08 01:51        46.4     1491613242618878185577  5.9251
      Manual testing  53943343        F       2011-09-08 01:51        46.4     1731142577056405403329  6.8776
      Manual testing  53939653        F       2011-09-08 01:51        46.4     2159196403015119746809  8.2912
      Manual testing  53926889        F       2011-09-08 01:51        46.4     1488899454477100008041  5.9153
      Manual testing  53893001        F       2011-09-08 01:51        46.4     1210884819771634368961  4.5960
      Manual testing  53845117        F       2011-09-08 01:51        46.4     1455530003076400213657  5.7791
      Manual testing  53831213        F       2011-09-08 01:50        46.4     2196646655410971539927  8.4181
      Manual testing  53827027        F       2011-09-08 01:50        46.4     1492043557543469011351  5.9398
      Manual testing  53818909        F       2011-09-08 01:50        46.4     1503728456651921589679  5.9907
      Manual testing  53793841        F       2011-09-08 01:50        46.4     2159111437013417041321  8.3135
      Manual testing  53793739        F       2011-09-08 01:50        46.4     2240398596638990053753  8.5505
      Manual testing  53793529        F       2011-09-08 01:50         0.0     1565017322493874459633  6.2497
      Manual testing  53784751        F       2011-09-08 01:49        46.4     1920981599037488324647  7.5653
      Manual testing  53783341        F       2011-09-08 01:49         0.0     1268266729928659877671  4.9023
      Manual testing  53782213        F       2011-09-08 01:49        46.4     1798763730102830575673  7.1440
      Manual testing  53775017        F       2011-09-08 01:49        46.4     1631915654684596644113  6.5204
      Manual testing  53774891        F       2011-09-08 01:49         0.0     2322692900141210708687  8.7849
      Manual testing  53767589        F       2011-09-08 01:49        46.4     2139671895499737900391  8.2595
      Manual testing  53761613        F       2011-09-08 01:48        46.4     1387271828510166195263  5.4798
      Manual testing  53759521        F       2011-09-08 01:48        46.4     1350211560841790318143  5.3063
      Manual testing  53758921        F       2011-09-08 01:48        46.4     2036083908052062578569  7.9424
      Manual testing  53754227        F       2011-09-08 01:48        46.4     1521413322597200436577  6.0730
      Manual testing  54348187        F       2011-09-08 01:48        46.4     866314010759443479929   3.4143
      Manual testing  54238913        F       2011-09-08 01:47         0.0     1593160805828848023583  6.3118
      Manual testing  54230963        F       2011-09-08 01:47        46.4     1722744246078383126503  6.8102
      Manual testing  54228931        F       2011-09-08 01:47        46.4     1584784749628288167593  6.2794
      Manual testing  54065197        F       2011-09-08 01:47        46.4     1399851258791703559687  5.5067
      Manual testing  54050351        F       2011-09-08 01:46        46.4     2008592980854566971903  7.8128
      Manual testing  54224111        F       2011-09-08 01:46        46.4     2108484823288142148959  8.0965
      Manual testing  54223111        F       2011-09-08 01:46        46.4     1685543169811627002631  6.6723
      Manual testing  54209443        F       2011-09-08 01:46        46.4     2029943966924453721943  7.8571
      Manual testing  54206939        F       2011-09-08 01:46        46.4     1481781528014850629881  5.8543
      Manual testing  54192881        F       2011-09-08 01:45        46.4     1198015629765512144497  4.5025
      Manual testing  54187997        F       2011-09-08 01:45        46.4     2332988014452270710167  8.7461
      Manual testing  54169909        F       2011-09-08 01:45        46.4     1714966801552978169249  6.7890
      Manual testing  54155371        F       2011-09-08 01:45        46.4     1509206823637033982231  5.9767
      Manual testing  54138731        F       2011-09-08 01:45        46.4     1948980022747872940097  7.6080
      Manual testing  54134207        F       2011-09-08 01:44        46.4     1538862991306728633167  6.1030
      Manual testing  54108877        F       2011-09-08 01:44        46.4     2091051744705127913663  8.0608
      Manual testing  54106783        F       2011-09-08 01:44        46.4     2246117740939398898513  8.5173
      Manual testing  54078257        F       2011-09-08 01:44        46.4     1911152269868873862209  7.4915
      Manual testing  54077329        F       2011-09-08 01:44        46.4     2279895693798175616329  8.6171
      Manual testing  54074729        F       2011-09-08 01:44        46.4     1849722300472015424737  7.2836
      Manual testing  54069077        F       2011-09-08 01:43        46.4     1748000120514475419353  6.9234
      Manual testing  54068771        F       2011-09-08 01:43        46.4     1734543622644450065039  6.8742
      Manual testing  54060109        F       2011-09-08 01:43        46.4     1342298706628903777207  5.2393
      Manual testing  54054757        F       2011-09-08 01:43        46.4     2208955504393370849959  8.4190
      Manual testing  54030629        F       2011-09-08 01:43        46.4     1943695707708475580969  7.6059
      Manual testing  54020977        F       2011-09-08 01:43        46.4     1271708012112395593513  4.8981
      Manual testing  54008023        F       2011-09-08 01:42        46.4     2015727238738593338711  7.8416
      Manual testing  54002513        F       2011-09-08 01:42        46.4     1857235080986791295071  7.3192
      Manual testing  54999079        F       2011-09-08 01:42        46.4     2038525741164628507921  7.7708
  • Case 2:
    • Factors are pulled out and submitted first. We think you lose credit for any intermediate stages leading to the factor. Note the lower credit.
    • Code:
      Manual testing  57624647        F-PM1   2011-09-28 00:47         8.0     872282290409433206087   2.4586
      Manual testing  55565219        F       2011-09-28 00:47         8.0     588545869424112025159   0.7394
      Manual testing  57434821        F-PM1   2011-09-28 00:47         8.0     2168061732708850625393  2.4586
      Manual testing  57700667        F-PM1   2011-09-28 00:47         8.0     1452911844037266286073  2.4586
      Manual testing  57440413        F-PM1   2011-09-28 00:47         8.0     2055903386758026968527  2.4586
      Manual testing  57447163        F-PM1   2011-09-28 00:47         8.0     2004457975438677417881  2.4586
      Manual testing  55973443        F-PM1   2011-09-28 00:47         8.0     823945115202934863889   2.4586
      Manual testing  55970683        F-PM1   2011-09-28 00:47         8.0     1950825757304697398449  2.4586
      Manual testing  55603349        F       2011-09-28 00:47         8.0     328655362610560861049   0.7496
      Manual testing  55997831        F-PM1   2011-09-28 00:47         8.0     1658958634690815943231  2.4586
      Manual testing  57526207        F-PM1   2011-09-28 00:47         8.0     1683376280236655173801  2.4586
      Manual testing  57629267        F-PM1   2011-09-28 00:47         8.0     1655125698224915334937  2.4586
      Manual testing  57532793        F-PM1   2011-09-28 00:47         8.0     2273235048516588376151  2.4586
  • Note: Most of the factors are 69⇒70 or 70⇒71.
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Old 2011-09-28, 03:07   #6
James Heinrich
 
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Quote:
Originally Posted by Xyzzy View Post
We think you lose credit for any intermediate stages leading to the factor. Note the lower credit.
You would. PrimeNet will accept a factor for any exponent at any time, even if it's unassigned, poached, or otherwise not available for registration. But of course, as soon as you submit a factor, any further submissions for that exponent (unless they're additional factors) become irrelevant. PrimeNet no longer cares about that exponent once it's factored, all data on factor depth, P-1/ECM bounds are purged.

Also note that the majority of your second batch of factors are misattributed to P-1.
There's a related discussion going on in the mfaktc thread starting around post #1216.
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Old 2011-09-30, 15:10   #7
gjmccrac
 
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Odd example from the recent results report. Seems the same TF range is reported twice. TF credit is doubled


Code:
Piepen               Manual testing   58289999  NF       Sep 30 2011  2:44PM   0.0  12.3071  no factor for M58289999 from 2^70 to 2^72 [mfakto 0.08-Win mfakto_cl_barrett79]                                                                                                                         
Piepen               Manual testing   58289999  NF       Sep 30 2011  2:44PM   0.0   2.0512  no factor for M58289999 from 2^69 to 2^70 [mfakto 0.08-Win mfakto_cl_barrett79]                                                                                                                         
Piepen               Manual testing   58289999  NF       Sep 30 2011  2:44PM   1.7  12.3071  no factor for M58289999 from 2^70 to 2^72 [mfakto 0.08-Win mfakto_cl_barrett79]

Last fiddled with by gjmccrac on 2011-09-30 at 15:12 Reason: added one more sentence.
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Old 2011-10-10, 02:32   #8
Dubslow
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I would like to report the same bug, getting double credit, or in the second case, 1.5 times credit for finding a factor.
Code:
Manual testing	25464869	NF	2011-10-10 02:15	0.0	no factor for M25464869 from 2^67 to 2^68 [mfaktc 0.17-Win barrett79_mul32]	 1.1738
Manual testing	25451429	F	2011-10-09 17:48	0.0	252560470228061146847	 2.0779
Manual testing	25464247	NF	2011-10-09 17:48	0.0	no factor for M25464247 from 2^67 to 2^68 [mfaktc 0.17-Win barrett79_mul32]	 1.1738
Code:
Manual testing	25472509	F	2011-10-10 02:15	0.0	191545676238561976081	 1.6080
Manual testing	25494233	NF	2011-10-10 02:15	0.0	no factor for M25494233 from 2^67 to 2^68 [mfaktc 0.17-Win barrett79_mul32]	 1.1725

Last fiddled with by Dubslow on 2011-10-10 at 02:33
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Old 2011-10-10, 04:01   #9
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This is known...most of us notice that it has a very small net effect, since 69 times out of 70, or worse, we don't find a factor. James Heinrich is helping out on the server side; this will probably be fixed in mfaktc-0.18.
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Old 2011-10-13, 06:45   #10
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Same problem here. Working in the 292M range, a no-factor result from 64->65 is worth 0.0128 GHz-days. But when I submitted 42 mfaktc "factors found" in the same range and same bit level, credit granted ranged from a low of 0.0123 GHz-days to a high of 0.0262 GHz-days.

I suppose it's some payback for the old v4 days when factors (of any size!) were credited with something like 0.001 P90-years = 0.0051 GHz-days!
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Old 2011-10-13, 07:00   #11
LaurV
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Or some bonus for the fact that you saved the time for two LL's?
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