is 2 1971589 - 1
has 593508 decimal digits
takes 0.130 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L686597561EE8C671double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual271242.483870.4225%19715892464486251.45786.6066%243.941672.3766%1.9541%
PrimeNet2580.019563.7931%80001400000.00142.4720%0.020964.6881%0.8950%
GPU722620.311666.1290%80001000000.00121.1961%0.312866.5342%0.4051%
Difference+9+242.1721+4.2935%+1963589+246348625+1.4566+5.4105%+243.6287+5.8424%+5.8424%

Known prime factors (1 factor, 96.2 bits, 0.00488039% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1971589923522780349780940913444357932996.22123420773303913263385864
23 × 2927596662989157923233
2021-01-28829275966629891579232331.097e+101.521e+132.840e+13

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-03-18T02:52:00kurlyhex100000030000000---0.246--4.322%
2018-01-22T18:11:03Jocelyn Larouchelow 4M19715893000000012---0.334--4.643%
2018-02-14T12:53:52Jocelyn Larouchelow 4M19715896000000012---0.489--5.278%
2018-03-05T13:35:44Jocelyn Larouchelow 4M197158912000000012---0.801--5.924%
2018-09-18T11:52:40Jocelyn Larouchelow 4M197158919715890012---1.202--6.394%
2018-11-26T12:53:55Jocelyn LaroucheManual testing197158924644862512---1.458--6.607%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1997-11-11T00:00:00ANONYMOUSv4_computers21257--0.010--
1998-12-27T00:00:00twmossv4_computers21258--0.019--
2016-02-23T16:29:01Mark RoseManual testing258260--0.058--
2009-12-31T02:52:00S485122USB-W260261--0.078--
2016-02-23T16:29:01Mark RoseManual testing261262--0.156--
2011-08-27T22:19:00GrunwalderGIMPManual testing21263--0.810--
2016-02-23T16:29:01Mark RoseManual testing262263--0.498--
2015-03-21T10:32:00lycornManual testing263264--0.996--
2015-03-21T10:32:00lycornManual testing264265--1.895--
2015-09-09T11:47:00ramgeisManual testing265266--3.790--
2018-04-07T11:55:34YxinityManual testing266267--7.580--
2018-04-07T11:55:34YxinityManual testing267268--15.16--
2018-04-07T11:55:34YxinityManual testing268269--30.32--
2018-04-07T11:55:34YxinityManual testing269270--60.64--
2018-06-15T15:56:17ramgeisManual testing270271--121.3--


ECM factoring results:

Old Calculation Method

Total ECM effort:14.608 GHz-days
Estimated T-Level:23.089
DigitsB1CurvesCompleteFacMiss
2011000173 / 1001.73017.575%
2550000173 / 2800.61853.850%

New Calculation Method

Total ECM effort:14.608 GHz-days
Estimated T-Level:23.089
DigitsB1CompleteFacMiss
20110005.5810.377%
25500000.50460.388%
302500000.03196.942%
3510000000.00199.858%


ECM Summary

B1B2factorcurvesGHz-days
50000500000017014.35
50000500000030.253


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1997-11-11T00:00:00ANONYMOUSv4_computers686597561EE8C6710.130
1999-01-29T00:00:00twmossv4_computers686597561EE8C6710.130
2015-06-28T05:06:00MadPooManual testing686597561EE8C6710.130


PRP results:
dateuseridcompidcofactorsres64PRP
2021-01-30T14:45:55Sébastien BrouckePortable_Seb
92352278034978094091344435793
4E334561C1A339__no
2021-01-31T02:45:07ATH5960X
92352278034978094091344435793
4E334561C1A3392Ano


P-1 factor-bounds graph:
B1 = 1971589, B2 = 246448625 (P-1 stage 2)
B1 = 1971589, B2 = 197158900 (P-1 stage 2)
B1 = 1971589, B2 = 120000000 (P-1 stage 2)
B1 = 1971589, B2 = 60000000 (P-1 stage 2)
B1 = 1971589, B2 = 30000000 (P-1 stage 2)
B1 = 1000000, B2 = 30000000 (P-1 stage 2)
B1 = 1971589 (P-1 stage 1)
B1 = 1000000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2021-01-31T02:45:07+00:00