is 2 3716969 - 1
has 1118920 decimal digits
takes 0.390 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L22DA012CA4447B97double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2677.994167.1642 %1000001303648501.09616.0020 %9.090269.1350 %
Target2640.957665.6250 %2200022500000.02182.1073 %0.979466.3494 %
Difference+3+7.0365+1.5392 %+78000+128114850+1.0742+3.8947%+8.1108+2.7856 %

Known prime factors (2 factors, 136.7 bits, 0.00367816% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
37169692202615184082170538472167.57829629184210067
3 × 13 × 67 × 11339144359
2017-06-22671133914435912.11494.083175.72
37169696497088161608643260492169.13887397664086096
24 × 7 × 13 × 17 × 73 × 48368951
2022-05-25734836895153.9540.40130.7496

1 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2009-07-06Carsten Kossendeymother20000265000--0.0051.778%
2012-12-14Squeeky_SquirrelT7500_2200245000771750012--0.0996.018%
2022-03-05JossManual testing9000090000--0.0141.459%
2022-03-22JossManual testing100000100000--0.0151.541%
2022-05-25JossManual testing10000013036485022169.1381.3028.109%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1998-03-09ANONYMOUSv4_computers212600.021
2009-03-06S485122USB-Z2602610.041
2011-04-24Grant McCrackenhome2612620.083
2012-04-19GrunwalderGIMPManual testing212630.429
2016-02-23Mark RoseManual testing2622630.264
2015-01-22VictordeHollanderManual testing2632651.533
2016-02-24ramgeisManual testing2652662.010
2016-11-01Gordon SpenceManual testing2662674.021


ECM factoring results:
Total ECM effort:1.642 GHz-days
Estimated T-Level:1.731
DigitsB1CompleteFacMiss
20110000.34670.740%
25500000.03296.848%
302500000.00299.798%


ECM Summary

B1B2factorcurvesGHz-days
10.448
50000500000091.194


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-05-08ANONYMOUSv4_computers22DA012CA4447B970.390
1999-11-17ANONYMOUSv4_computers22DA012CA4447B970.390


PRP results:
dateuseridcompidcofactorsres64
2017-09-30alpertronManual testing
220261518408217053847
34F07A8F39489E29
2017-12-01Oliver KruseThreadripper-PC
220261518408217053847
34F07A8F39489E29
2022-06-01kutens
220261518408217053847
649708816160864326049
F21EF7F5D88A7639


CERT results:
dateuseridcompid
2022-06-01curtiscjckl240501c


P-1 factor-bounds graph:
B1 = 100000, B2 = 130364850 (P-1 stage 2)
B1 = 245000, B2 = 7717500 (P-1 stage 2)
B1 = 245000 (P-1 stage 1)
B1 = 100000 (P-1 stage 1)
B1 = 90000 (P-1 stage 1)
B1 = 20000, B2 = 265000 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
100
101
102
103
104
105
106
100
101
102
103
104
105
106
107
108
109
1010
1011
TF factor-bounds graph:
267
266
265
263
262
261
260
this exponent TF target: 64
TF double-checked to: 67
ECM T-Level=1.73 ~= -11-bit
250
260
270
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Last modified: 2024-03-13T02:15:48+00:00