is 2 4734151 - 1
has 1425122 decimal digits
takes 0.623 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L6973FA31F1BA449Bdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual271100.985067.6056%29000087000000.14283.1798%101.127968.6357%1.0301%
PrimeNet2610.064962.2951%200004000000.00783.1258%0.072763.4737%1.1786%
GPU722651.541164.6154%300006500000.01222.2813%1.553365.4226%0.8072%
Difference+6+99.4439+2.9902%+260000+8050000+0.1307+0.8986%+99.5746+3.2131%+3.2131%

Known prime factors:
No known factors for M4734151

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2009-09-06T04:46:00Carsten Kossendeydurandal25000387500---0.009--0.801%
2011-11-15T14:50:00Squeeky_SquirrelT7500_2200800001360000---0.029--1.601%
2016-11-30T23:56:07Squeeky_Squirreli5-5250U_1600290000870000012---0.143--3.180%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-03-31T00:00:00ANONYMOUSv4_computers21261--0.065--
2010-06-09T02:47:00markroldgamer261262--0.065--
2011-10-25T19:49:00GrunwalderGIMPManual testing21263--0.337--
2016-02-23T16:38:59Mark RoseManual testing262263--0.207--
2015-01-11T14:02:00VictordeHollanderManual testing263264--0.415--
2015-01-11T14:02:00VictordeHollanderManual testing264265--0.789--
2015-07-13T05:00:00snme2pm1Manual testing265266--1.578--
2017-12-14T03:47:42YxinityManual testing266267--3.157--
2018-10-01T16:06:56YxinityManual testing267268--6.314--
2021-05-17T10:41:51TJAOIManual testing268269--12.63--
2021-08-22T16:40:22SRBaseManual testing269270--25.26--
2021-09-01T13:34:06Jon PaceManual testing270271--50.51--


ECM factoring results:

Old Calculation Method

Total ECM effort:1.777 GHz-days
Estimated T-Level:0.450
DigitsB1CurvesCompleteFacMiss
20110009 / 1000.09091.352%
25500009 / 2800.03296.831%

New Calculation Method

Total ECM effort:1.777 GHz-days
Estimated T-Level:0.450
DigitsB1CompleteFacMiss
20110000.34670.740%
25500000.03296.848%
302500000.00299.798%


ECM Summary

B1B2factorcurvesGHz-days
50000500000091.777


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-08-02T00:00:00ANONYMOUSv4_computers6973FA31F1BA449B0.623
2000-01-04T00:00:00ANONYMOUSv4_computers6973FA31F1BA449B0.623


PRP results:
No PRP results for M4734151


P-1 factor-bounds graph:
B1 = 290000, B2 = 8700000 (P-1 stage 2)
B1 = 290000 (P-1 stage 1)
B1 = 80000, B2 = 1360000 (P-1 stage 2)
B1 = 80000 (P-1 stage 1)
B1 = 25000, B2 = 387500 (P-1 stage 2)
B1 = 25000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2021-09-01T13:34:06+00:00