is 2 3267973 - 1
has 983758 decimal digits
takes 0.343 GHz-days to do one PRP test
Last-known PrimeNet details:
0 L-L tests remaining
ResidueStatus
L-L36EAD8891A68FD5Bdouble-checked
PRP9629B394049980E2double-checked

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26818.239167.6471%40000001500000001.82068.7783%20.059676.4254%13.0921%
PrimeNet2600.047063.3333%140002600000.00422.7736%0.051266.1069%2.7736%
GPU722641.089265.6250%170002800000.00481.6861%1.093967.3111%1.6861%
Difference+4+17.1499+2.0221%+3983000+149720000+1.8158+7.0922%+18.9657+9.1143%+9.1143%

Known prime factors (1 factor, 122.1 bits, 0.00373778% known):
Remaining cofactor is not a probable-prime

GHz-days
exponentfactordigitsbits*kmin B1min B2date foundmin. TFmin. P-1normal P-1
3267973589856587342461849509769085907927259137122.150902480815083940181742274317915
3 × 5 × 113 × 479 × 6521 × 1585427 × 2823857 × 38074097		2823857380740972020-11-185.593e+100.72250.8752

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2009-07-08T05:50:00Carsten Kossendeydurandal15000191250---0.004--0.786%
2011-09-17T12:11:00harleeP4_2600600001050000---0.017--1.930%
2014-06-21T17:26:00Jocelyn LaroucheManual testing7964079640---0.012--0.754%
2014-10-10T20:28:00Jocelyn LaroucheManual testing9928099280---0.015--0.861%
2016-01-16T00:42:30Jocelyn LaroucheManual testing37800037800006---0.086--3.579%
2020-11-18T12:55:51mikrMSI40000001500000001237122.1501.8210.6863.6418.778%
2021-01-18T13:43:06Jocelyn LaroucheManual testing39800032679736---0.084--3.477%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-05-20T00:00:00ANONYMOUSv4_computers?260--0.023--
2009-04-04T06:59:00S485122USB-A260261--0.047--
2011-09-20T03:21:00markroldgamer261262--0.094--
2012-12-30T00:06:00dbaughManual testing262263--0.300--
2015-02-07T18:05:00VictordeHollanderManual testing263264--0.601--
2015-02-07T18:05:00VictordeHollanderManual testing264265--1.143--
2015-06-28T13:57:00ThaManual testing265266--2.287--
2021-02-21T11:36:43Jocelyn LaroucheManual testing265266--2.287--
2021-02-22T09:03:46Jocelyn LaroucheManual testing266267--4.573--
2017-04-04T13:00:36Gordon SpenceManual testing266267--4.573--
2018-12-17T13:21:54TJAOIManual testing267268--9.147--


ECM factoring results:
Total ECM effort:2.183 GHz-days
Estimated T-Level:0.750
DigitsB1CurvesCompleteFacMiss
201100015 / 1000.15086.006%
255000015 / 2800.05494.775%

ECM Summary

B1B2factorcurvesGHz-days
500005000000152.183


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-11-17T00:00:00ANONYMOUSv4_computers36EAD8891A68FD5B0.343


PRP results:
dateuseridcompidcofactorsres64PRP
2020-11-18T16:00:16mrhx
5898565873424618495097690859079272591
9629B394049980E2no


P-1 factor-bounds graph:
B1 = 4000000, B2 = 150000000 (stage 2)
B1 = 4000000 (stage 1)
B1 = 378000, B2 = 3780000 (stage 2)
B1 = 398000, B2 = 3267973 (stage 2)
B1 = 398000 (stage 1)
B1 = 378000 (stage 1)
B1 = 60000, B2 = 1050000 (stage 2)
B1 = 99280 (stage 1)
B1 = 79640 (stage 1)
B1 = 60000 (stage 1)
B1 = 15000, B2 = 191250 (stage 2)
B1 = 15000 (stage 1)
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TF factor-bounds graph:
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Last modified: 2021-02-22T09:03:46+00:00