is 2 4701611 - 1
has 1415326 decimal digits
takes 0.619 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 L-L tests remaining
ResidueStatus
L-L405349B852145898double-checked
PRP0A61601914332907

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual271101.683967.6056%80000004000000005.60488.7170%107.288770.4295%2.8238%
PrimeNet2610.065362.2951%200004000000.00783.1221%0.073163.4723%1.1772%
GPU722651.551764.6154%300006000000.01172.2328%1.563465.4055%0.7901%
Difference+6+100.1322+2.9902%+7970000+399400000+5.5931+6.4842%+105.7253+5.0240%+5.0240%

Known prime factors (1 factor, 126.9 bits, 0.00269916% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
470161115917545139203141848228537294828387156739126.90416927756400096841112789358046453
3 × 102077 × 1118291 × 1790771 × 2167643 × 12734081
2021-08-102167643127340813.396e+100.52370.8422

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2009-09-08T03:37:00Carsten Kossendeydurandal25000381250---0.008--0.796%
2011-11-08T07:32:00Squeeky_SquirrelT7500_2200800001360000---0.029--1.599%
2015-07-03T05:01:00David Campeaui5-2500k103700030073000---0.500--4.804%
2021-08-10T15:39:49axnManual testing800000040000000039126.9045.6051.23811.218.717%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2002-03-10T00:00:00ANONYMOUSv4_computers?261--0.033--
2010-06-29T17:13:00markroldgamer261262--0.065--
2011-10-25T19:38:00GrunwalderGIMPManual testing21263--0.339--
2016-02-23T16:38:58Mark RoseManual testing262263--0.209--
2015-01-09T11:17:00VictordeHollanderManual testing263264--0.418--
2015-01-09T11:17:00VictordeHollanderManual testing264265--0.795--
2015-07-10T23:50:00snme2pm1Manual testing265266--1.589--
2018-10-07T13:26:44YxinityManual testing266267--3.179--
2018-04-15T00:55:22BloodERazorManual testing266267--3.179--
2018-10-06T13:42:32YxinityManual testing267268--6.358--
2018-10-07T13:26:44YxinityManual testing268269--12.72--
2018-10-07T13:26:44YxinityManual testing269270--25.43--
2021-01-27T11:53:13-Anonymous-Manual testing270271--50.86--


ECM factoring results:

Old Calculation Method

Total ECM effort:1.774 GHz-days
Estimated T-Level:0.450
DigitsB1CurvesCompleteFacMiss
20110009 / 1000.09091.352%
25500009 / 2800.03296.831%

New Calculation Method

Total ECM effort:1.774 GHz-days
Estimated T-Level:0.450
DigitsB1CompleteFacMiss
20110000.29074.802%
25500000.02697.410%
302500000.00299.839%


ECM Summary

B1B2factorcurvesGHz-days
50000500000091.774


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-12-23T00:00:00ANONYMOUSv4_computers405349B8521458980.619


PRP results:
dateuseridcompidcofactorsres64PRP
2021-08-12T10:33:56GURA LOVE
159175451392031418482285372948283871567
0A61601914332907no


P-1 factor-bounds graph:
B1 = 8000000, B2 = 400000000 (P-1 stage 2)
B1 = 8000000 (P-1 stage 1)
B1 = 1037000, B2 = 30073000 (P-1 stage 2)
B1 = 1037000 (P-1 stage 1)
B1 = 80000, B2 = 1360000 (P-1 stage 2)
B1 = 80000 (P-1 stage 1)
B1 = 25000, B2 = 381250 (P-1 stage 2)
B1 = 25000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2021-08-12T10:33:56+00:00