is 2 3811007 - 1
has 1147228 decimal digits
takes 0.400 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LA8559A4B210438B1double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2677.796967.1642 %1000001303648501.09616.0215 %8.892969.1414 %
Target2640.934065.6250 %2400022500000.02212.1643 %0.956166.3690 %
Difference+3+6.8629+1.5392 %+76000+128114850+1.0739+3.8572%+7.9368+2.7724 %

Known prime factors (1 factor, 66.5 bits, 0.00174583% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
38110071068214422759499743372166.53414014857789024
25 × 3 × 145988101969
2009-09-19321459881019693.87521,211.32,262.4

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2009-07-12Carsten Kossendeymother20000270000--0.0051.796%
2022-03-05JossManual testing9000090000--0.0141.465%
2022-03-22JossManual testing100000100000--0.0151.547%
2022-05-25JossManual testing100000130364850--1.3028.134%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2001-07-07David Campeauv4_computers212600.020
2009-03-01S485122USB-A2602610.040


ECM factoring results:
Total ECM effort:0.200 GHz-days
DigitsB1CompleteFacMiss


ECM Summary

B1B2factorcurvesGHz-days
10.200


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-08-16ANONYMOUSv4_computersA8559A4B210438B10.400


PRP results:
dateuseridcompidcofactorsres64
2017-09-20kkmrkkblmbrbkManual testing
106821442275949974337
3D805991AD9D0CFF
2017-12-11Oliver KruseGTX-1
106821442275949974337
3D805991AD9D0CFF


CERT results:
No CERT results for M3811007


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)
100
101
102
103
104
105
100
101
102
103
104
105
106
107
108
109
1010
1011
1012
TF factor-bounds graph:
261
260
this exponent TF target: 64
TF double-checked to: 67
250
260
270
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Last modified: 2024-02-09T03:30:02+00:00