is 2 4395029 - 1
has 1323036 decimal digits
takes 0.548 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L91FEB7A09B516660double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26813.561966.1765%2237739626566811.00007.5696%14.561968.7368%2.5603%
PrimeNet2610.069962.2951%180003600000.00662.9369%0.076563.4024%1.1074%
GPU722651.660064.6154%260005000000.00942.0314%1.669465.3342%0.7188%
Difference+3+11.9019+1.5611%+2211739+62156681+0.9906+5.5382%+12.8925+3.4026%+3.4026%

Known prime factors (1 factor, 73.2 bits, 0.00166572% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
4395029109158305273181005339772373.2091241838282218172
22 × 3 × 17 × 6087442559893
2019-07-29176087442559893560.7259,980112,026

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2009-08-14T05:03:00Carsten Kossendeydurandal25000356250---0.008--1.198%
2012-01-12T19:52:00Squeeky_SquirrelT7500_22001100002255000---0.041--2.761%
2018-12-03T13:03:46Ismo Laitela6600K22377396265668112---1.000--7.570%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-05-23T00:00:00ANONYMOUSv4_computers21260--0.035--
1998-05-23T00:00:00ANONYMOUSv4_computers21261--0.070--
2010-11-08T04:27:00markrut261262--0.070--
2012-02-29T05:45:00GrunwalderGIMPManual testing21263--0.363--
2016-02-23T16:38:50Mark RoseManual testing262263--0.223--
2014-08-01T09:52:00JayderManual testing263264--0.447--
2014-08-01T19:42:00lycornManual testing264265--0.850--
2015-06-20T11:17:00snme2pm1Manual testing265266--1.700--
2018-05-04T10:56:38chuenkitManual testing266267--3.401--
2018-10-30T00:57:58chuenkitManual testing267268--6.801--


ECM factoring results:

Old Calculation Method

Total ECM effort:2.205 GHz-days
Estimated T-Level:0.600
DigitsB1CurvesCompleteFacMiss
201100012 / 1000.12088.638%
255000012 / 2800.04395.797%

New Calculation Method

Total ECM effort:2.205 GHz-days
Estimated T-Level:0.600
DigitsB1CompleteFacMiss
20110000.46263.031%
25500000.04395.819%
302500000.00399.731%


ECM Summary

B1B2factorcurvesGHz-days
50000500000091.654
50000500000030.551


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-07-05T00:00:00ANONYMOUSv4_computers91FEB7A09B5166600.548
1999-11-17T00:00:00cbwoodv4_computers91FEB7A09B5166600.548


PRP results:
dateuseridcompidcofactorsres64PRP
2019-07-29T04:33:43ATHec2-PRPCF
10915830527318100533977
EE4BDA1E65267337no
2019-07-30T04:46:20marssystemsSYSTEM01
10915830527318100533977
EE4BDA1E65267337no


P-1 factor-bounds graph:
B1 = 2237739, B2 = 62656681 (P-1 stage 2)
B1 = 2237739 (P-1 stage 1)
B1 = 110000, B2 = 2255000 (P-1 stage 2)
B1 = 110000 (P-1 stage 1)
B1 = 25000, B2 = 356250 (P-1 stage 2)
B1 = 25000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2019-07-30T04:46:20+00:00