is 2 4400377 - 1
has 1324646 decimal digits
takes 0.549 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L780DD980C75642BEdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2676.752665.6716 %2600001957183801.97297.6330 %8.725568.2919 %
Target2651.658064.6154 %2600025000000.02912.0318 %1.687065.3343 %
Difference+2+5.0946+1.0563 %+234000+193218380+1.9438+5.6012%+7.0384+2.9576 %

Known prime factors (1 factor, 65.9 bits, 0.00149812% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
4400377699441089965376623192065.9237947513246767
29 × 31 × 4093 × 2159881
2012-04-05409321598812.51330.02200.0397

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2009-07-16Carsten Kossendeymother25000356250--0.0081.835%
2012-03-23Squeeky_SquirrelT7500_220010500019162506--0.0373.720%
2012-04-05Squeeky_SquirrelT7500_22002065.9230.0500.000%
2023-04-15Kevin_9611Factor_1260000195718380
skipped known factor: 69944108996537662319
--2.1939.148%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2002-02-10David Campeauv4_computers212610.035
2010-11-03markroldgamer2612620.070
2012-01-17GrunwalderGIMPManual testing212630.363


ECM factoring results:
Total ECM effort:11.375 GHz-days
Estimated T-Level:21.708
DigitsB1CompleteFacMiss
20110003.6922.491%
25500000.34271.061%
302500000.02297.868%
3510000000.00199.899%


ECM Summary

B1B2factorcurvesGHz-days
5000050000009611.37


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-12-08ANONYMOUSv4_computers780DD980C75642BE0.549
1999-12-15ANONYMOUSv4_computers780DD980C75642BE0.549


PRP results:
dateuseridcompidcofactorsres64
2017-09-20kkmrkkblmbrbkManual testing
69944108996537662319
7CECED22C86D7973
2018-02-09Oliver KruseGTX-7
69944108996537662319
7CECED22C86D7973


CERT results:
No CERT results for M4400377


P-1 factor-bounds graph:
B1 = 260000, B2 = 195718380 (P-1 stage 2)
B1 = 260000 (P-1 stage 1)
B1 = 105000, B2 = 1916250 (P-1 stage 2)
B1 = 105000 (P-1 stage 1)
B1 = 25000, B2 = 356250 (P-1 stage 2)
B1 = 25000 (P-1 stage 1)
102
103
104
105
106
102
103
104
105
106
107
108
109
TF factor-bounds graph:
263
262
261
this exponent TF target: 65
TF double-checked to: 67
ECM T-Level=21.71 ~= 56-bit
250
260
270
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Last modified: 2024-03-13T02:15:48+00:00