is 2 3462947 - 1
has 1042451 decimal digits
takes 0.364 GHz-days to do one PRP test
Last-known PrimeNet details:
0 L-L tests remaining
ResidueStatus
L-L6752CFB670B2A162double-checked
PRP36B7B781D866FE80double-checked

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26934.475568.1159%20000000100000000011.177111.6152%45.652579.7311%16.3978%
PrimeNet2600.044463.3333%150002800000.00452.9033%0.048866.2366%2.9033%
GPU722641.027865.6250%190003600000.00571.8851%1.033667.5101%1.8851%
Difference+5+33.4477+2.4909%+19981000+999640000+11.1713+9.7301%+44.6190+12.2211%+12.2211%

Known prime factors (1 factor, 137.0 bits, 0.00395690% known):
Remaining cofactor is not a probable-prime

GHz-days
exponentfactordigitsbits*kmin B1min B2date foundmin. TFmin. P-1normal P-1
346294717732224349996970653911095418349169704464942137.02525602794888280084352880791156129692
22 × 3 × 7 × 43 × 67 × 79 × 239 × 46567 × 219787 × 774119 × 707215633
7741197072156332021-02-264.482e+105.979410.960

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2009-07-06T11:12:00Carsten Kossendeyleela20000235000---0.005--0.806%
2011-11-08T13:25:00harleeP4_260060000990000---0.017--1.687%
2014-08-21T21:46:00Jocelyn LaroucheManual testing7853578535---0.012--0.653%
2014-09-23T09:31:00HBendtzHAL900750000010000000---0.155--4.164%
2021-02-26T12:56:27axnManual testing20000000100000000042137.02511.180.72722.3511.615%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2016-02-23T16:29:30Mark RoseManual testing21260--0.044--
2009-03-21T17:05:00S485122USB-A260261--0.044--
2011-07-28T21:50:00markroldgamer261262--0.089--
2012-08-18T15:35:00GrunwalderGIMPManual testing21263--0.461--
2016-02-23T16:29:30Mark RoseManual testing262263--0.283--
2015-02-07T18:04:00VictordeHollanderManual testing263264--0.567--
2015-02-07T18:04:00VictordeHollanderManual testing264265--1.079--
2015-04-19T11:20:00Gordon SpenceManual testing265266--2.158--
2017-02-10T15:33:25Gordon SpenceManual testing266267--4.316--
2019-02-11T13:34:45TJAOIManual testing267268--8.632--
2021-01-07T08:06:15axnManual testing268269--17.26--


ECM factoring results:
Total ECM effort:2.207 GHz-days
Estimated T-Level:0.750
DigitsB1CurvesCompleteFacMiss
201100015 / 1000.15086.006%
255000015 / 2800.05494.775%

ECM Summary

B1B2factorcurvesGHz-days
500005000000152.207


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-08-31T00:00:00ANONYMOUSv4_computers6752CFB670B2A1620.364


PRP results:
dateuseridcompidcofactorsres64PRP
2021-02-28T19:39:53Cork3tits
177322243499969706539110954183491697044649
36B7B781D866FE80no


P-1 factor-bounds graph:
B1 = 20000000, B2 = 1000000000 (stage 2)
B1 = 20000000 (stage 1)
B1 = 500000, B2 = 10000000 (stage 2)
B1 = 500000 (stage 1)
B1 = 60000, B2 = 990000 (stage 2)
B1 = 78535 (stage 1)
B1 = 60000 (stage 1)
B1 = 20000, B2 = 235000 (stage 2)
B1 = 20000 (stage 1)
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TF factor-bounds graph:
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Last modified: 2021-02-28T19:39:53+00:00