is 2 3797371 - 1
has 1143123 decimal digits
takes 0.399 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L3AA3962572748D62double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2677.824967.1642 %1000001303648501.09616.0187 %8.920969.1405 %
Target2640.937365.6250 %2400022500000.02212.1629 %0.959466.3685 %
Difference+3+6.8876+1.5392 %+76000+128114850+1.0739+3.8558%+7.9615+2.7720 %

Known prime factors (2 factors, 144.3 bits, 0.00380101% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
3797371471265141485192986412065.3536205150108920
23 × 3 × 5 × 7 × 2843 × 2598341
2012-12-27284325983412.27900.02200.0403
37973715983809928806320147513512478.98578788850612783425
52 × 5651 × 34819 × 16017073
2022-05-26348191601707328,0720.13790.2482

1 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2009-07-15Carsten Kossendeymother20000270000--0.0051.795%
2012-12-27Squeeky_SquirrelT7500_22002065.3530.1010.000%
2022-03-05JossManual testing9000090000--0.0141.464%
2022-03-22JossManual testing100000100000--0.0151.546%
2022-05-26JossManual testing10000013036485022478.9851.3028.130%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2009-02-28S485122USB-Z2602610.040
2011-04-02markroldgamer2612620.081
2012-04-20GrunwalderGIMPManual testing212630.420


ECM factoring results:
Total ECM effort:0.749 GHz-days
Estimated T-Level:1.154
DigitsB1CompleteFacMiss
20110000.23179.392%
25500000.02197.887%
302500000.00199.865%


ECM Summary

B1B2factorcurvesGHz-days
50000500000060.749


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-05-01ANONYMOUSv4_computers3AA3962572748D620.399
1999-11-17ANONYMOUSv4_computers3AA3962572748D620.399


PRP results:
dateuseridcompidcofactorsres64
2017-09-20kkmrkkblmbrbkManual testing
47126514148519298641
1FC18110D531FD21
2017-12-09Oliver KruseGTX-0
47126514148519298641
1FC18110D531FD21
2022-06-01XZT7060Micro4
47126514148519298641
598380992880632014751351
DD2090A44A30125F


CERT results:
dateuseridcompid
2022-06-01curtiscwcm202--16l


P-1 factor-bounds graph:
B1 = 100000, B2 = 130364850 (P-1 stage 2)
B1 = 100000 (P-1 stage 1)
B1 = 90000 (P-1 stage 1)
B1 = 20000, B2 = 270000 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
102
103
104
105
102
103
104
105
106
107
108
109
TF factor-bounds graph:
263
262
261
this exponent TF target: 64
TF double-checked to: 67
ECM T-Level=1.15 ~= -13-bit
250
260
270
280
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Last modified: 2024-03-13T02:15:48+00:00