is 2 3253463 - 1
has 979390 decimal digits
takes 0.342 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-
PRP25E0D10D5FF5C328verified PRP

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26818.320467.6471%40000001500000001.82068.7746%20.141070.4859%2.8389%
PrimeNet2600.047263.3333%140002600000.00422.7714%0.051464.3495%1.0162%
GPU722641.094065.6250%160002800000.00461.6552%1.098666.1940%0.5690%
Difference+4+17.2264+2.0221%+3984000+149720000+1.8159+7.1195%+19.0424+4.2919%+4.2919%

Known prime factors (1 factor, 72.1 bits, 0.00221675% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
325346351364396930766771607832272.121789380376091057
59 × 13379328408323
2021-01-245913379328408323429.93111,011207,337

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2009-07-04T23:20:00Carsten Kossendeydurandal15000191250---0.004--0.785%
2011-09-12T11:55:00harleeP4_2600600001050000---0.017--1.929%
2014-06-11T02:10:00Jocelyn LaroucheManual testing7972879728---0.012--0.754%
2014-10-07T22:12:00Jocelyn LaroucheManual testing9945699456---0.015--0.861%
2016-01-15T01:35:56Squeeky_SquirrelP4_2600205000584250012---0.078--3.623%
2018-08-06T19:37:25Jocelyn Larouchelow 4M4100001230000---0.069--2.667%
2018-08-07T17:09:27Jocelyn Larouchelow 4M4100001640000---0.073--2.906%
2018-08-08T00:41:55Jocelyn Larouchelow 4M4100002050000---0.076--3.092%
2018-08-08T12:55:41Jocelyn Larouchelow 4M4100002460000---0.079--3.245%
2018-08-08T23:04:21Jocelyn Larouchelow 4M4100002870000---0.083--3.376%
2018-08-10T10:23:28Jocelyn Larouchelow 4M4100004100000---0.093--3.679%
2020-08-01T03:44:31mikrMSI400000015000000012---1.821--8.775%
2022-04-02T19:48:46Jocelyn LaroucheManual testing1000000134316000---1.258--7.643%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-08-24T00:00:00ANONYMOUSv4_computers21260--0.047--
2009-04-04T06:59:00S485122USB-A260261--0.047--
2011-09-20T20:26:00markrManual testing21262--0.189--
2012-12-30T00:01:00dbaughManual testing262263--0.302--
2015-02-18T11:40:00VictordeHollanderManual testing263264--0.603--
2015-02-18T11:40:00VictordeHollanderManual testing264265--1.148--
2015-06-28T13:57:00ThaManual testing265266--2.297--
2017-03-30T02:15:53Gordon SpenceManual testing266267--4.594--
2019-01-07T14:44:15TJAOIManual testing267268--9.187--


ECM factoring results:

Old Calculation Method

Total ECM effort:4.494 GHz-days
Estimated T-Level:1.300
DigitsB1CurvesCompleteFacMiss
201100026 / 1000.26077.004%
255000026 / 2800.09391.117%

New Calculation Method

Total ECM effort:4.494 GHz-days
Estimated T-Level:1.300
DigitsB1CompleteFacMiss
20110000.92239.765%
25500000.08691.715%
302500000.00699.439%


ECM Summary

B1B2factorcurvesGHz-days
500005000000152.181
50000500000030.436
50000664691830.500
800001128000051.376


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-11-10T00:00:00ANONYMOUSv4_computers087B7B87557164__0.342


PRP results:
dateuseridcompidcofactorsres64PRP
2021-01-24T13:46:15ViliamF3
5136439693076677160783
25E0D10D5FF5C328no


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 = 410000, B2 = 4100000 (P-1 stage 2)
B1 = 410000, B2 = 2870000 (P-1 stage 2)
B1 = 410000, B2 = 2460000 (P-1 stage 2)
B1 = 205000, B2 = 5842500 (P-1 stage 2)
B1 = 410000, B2 = 2050000 (P-1 stage 2)
B1 = 410000, B2 = 1640000 (P-1 stage 2)
B1 = 410000, B2 = 1230000 (P-1 stage 2)
B1 = 410000 (P-1 stage 1)
B1 = 205000 (P-1 stage 1)
B1 = 60000, B2 = 1050000 (P-1 stage 2)
B1 = 99456 (P-1 stage 1)
B1 = 79728 (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: 2022-04-02T19:48:46+00:00