is 2 4836641 - 1
has 1455975 decimal digits
takes 0.637 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LAFE7ED5DC54A0456double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2676.143565.6716 %3200002243412602.39138.0925 %8.534868.4497 %
Target2651.508464.6154 %3200032500000.03962.3252 %1.548065.4381 %
Difference+2+4.6351+1.0563 %+288000+221091260+2.3517+5.7673%+6.9868+3.0115 %

Known prime factors (1 factor, 71.5 bits, 0.00147808% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
483664133144653984421733197532271.489342641246108836
22 × 101 × 281 × 49993 × 60373
2011-07-164999360373101.760.00970.0194

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2000-05-31ANONYMOUSv4_computers25000287500--0.0081.756%
2011-07-16USAFSSP4_26002271.4890.0210.000%
2023-04-14Kevin_9611Factor_2320000224341260
skipped known factor: 3314465398442173319753
--2.8689.652%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2010-05-01markrManual testing2612620.064


ECM factoring results:
Total ECM effort:0.395 GHz-days
Estimated T-Level:0.577
DigitsB1CompleteFacMiss
20110000.11589.102%
25500000.01198.938%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.395


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-06-20ANONYMOUSv4_computersAFE7ED5DC54A04560.637
2000-07-12ANONYMOUSv4_computersAFE7ED5DC54A04560.637
2000-12-07ANONYMOUSv4_computersAFE7ED5DC54A04560.637


PRP results:
dateuseridcompidcofactorsres64
2017-09-20kkmrkkblmbrbkManual testing
3314465398442173319753
1D3A3D1D4C1C5E54
2018-03-29deo2016VPS_001
3314465398442173319753
1D3A3D1D4C1C5E54


CERT results:
No CERT results for M4836641


P-1 factor-bounds graph:
B1 = 320000, B2 = 224341260 (P-1 stage 2)
B1 = 320000 (P-1 stage 1)
B1 = 25000, B2 = 287500 (P-1 stage 2)
B1 = 25000 (P-1 stage 1)
103
104
105
106
103
104
105
106
107
108
109
TF factor-bounds graph:
262
this exponent TF target: 65
TF double-checked to: 67
ECM T-Level=0.58 ~= -15-bit
250
260
270
280
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Last modified: 2024-03-13T02:15:48+00:00