is 2 3269081 - 1
has 984092 decimal digits
takes 0.343 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRPD0C0CB233A0D2138verified PRP

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26818.232967.6471%40000001500000001.82068.7786%20.053570.4872%2.8401%
PrimeNet2600.047063.3333%140002600000.00422.7738%0.051264.3504%1.0170%
GPU722641.088865.6250%170002800000.00481.6862%1.093666.2046%0.5796%
Difference+4+17.1441+2.0221%+3983000+149720000+1.8158+7.0924%+18.9599+4.2826%+4.2826%

Known prime factors (1 factor, 81.3 bits, 0.00248682% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
326908129687167208676661050122412581.296454059829179464520
23 × 3 × 5 × 379 × 9983725355749
2021-01-213799983725355749210,12082,837154,716

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2009-07-08T05:50:00Carsten Kossendeydurandal15000191250---0.004--0.786%
2011-09-18T03:33:00harleeP4_2600600001050000---0.017--1.930%
2014-06-26T21:21:00ANONYMOUSManual testing7963479634---0.012--0.754%
2014-10-10T20:28:00Jocelyn LaroucheManual testing9926899268---0.015--0.861%
2016-01-16T00:42:30Jocelyn LaroucheManual testing37800037800006---0.086--3.580%
2020-11-27T15:41:01mikrMSI400000015000000012---1.821--8.779%
2022-04-05T14:54:04Jocelyn LaroucheManual testing1000000134316000---1.258--7.647%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-05-20T00:00:00ANONYMOUSv4_computers21260--0.047--
2009-04-03T10:33:00S485122USB-Z260261--0.047--
2011-09-26T23:16:00Grant McCrackenthumper261262--0.094--
2013-01-03T08:49:00dbaughManual 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--2.286--
2017-04-04T13:00:37Gordon SpenceManual testing266267--4.572--
2018-12-17T13:21:53TJAOIManual testing267268--9.144--


ECM factoring results:

Old Calculation Method

Total ECM effort:4.067 GHz-days
Estimated T-Level:1.150
DigitsB1CurvesCompleteFacMiss
201100023 / 1000.23079.361%
255000023 / 2800.08292.100%

New Calculation Method

Total ECM effort:4.067 GHz-days
Estimated T-Level:1.150
DigitsB1CompleteFacMiss
20110000.98037.542%
25500000.09690.809%
302500000.00799.350%


ECM Summary

B1B2factorcurvesGHz-days
500005000000152.183
50000680000030.507
800001128000010.276
800001128000041.102


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-11-17T00:00:00ANONYMOUSv4_computersD91A6669A06E49__0.343


PRP results:
dateuseridcompidcofactorsres64PRP
2021-01-21T16:04:30mrhw
2968716720867666105012241
D0C0CB233A0D2138no


P-1 factor-bounds graph:
B1 = 4000000, B2 = 150000000 (P-1 stage 2)
B1 = 1000000, B2 = 134316000 (P-1 stage 2)
B1 = 4000000 (P-1 stage 1)
B1 = 1000000 (P-1 stage 1)
B1 = 378000, B2 = 3780000 (P-1 stage 2)
B1 = 378000 (P-1 stage 1)
B1 = 60000, B2 = 1050000 (P-1 stage 2)
B1 = 99268 (P-1 stage 1)
B1 = 79634 (P-1 stage 1)
B1 = 60000 (P-1 stage 1)
B1 = 15000, B2 = 191250 (P-1 stage 2)
B1 = 15000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-04-05T14:54:04+00:00