is 2 3245201 - 1
has 976903 decimal digits
takes 0.276 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L8A045EA33ED65201double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26818.367167.6471%40000001500000001.47538.7725%19.842470.4852%2.8382%
PrimeNet2600.047363.3333%140002600000.00342.7701%0.050764.3490%1.0157%
GPU722641.096865.6250%160002800000.00371.6544%1.100566.1937%0.5687%
Difference+4+17.2703+2.0221%+3984000+149720000+1.4716+7.1182%+18.7419+4.2915%+4.2915%

Known prime factors (1 factor, 95.8 bits, 0.00295183% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
3245201686273629431039542262655957032995.79310573669079835725772651
3 × 149 × 72701 × 2418517 × 134532949
2020-06-2824185171345329494.683e+91.18681.6895

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2009-07-04T06:45:00Carsten Kossendeydurandal15000191250---0.003--0.785%
2011-09-09T18:47:00harleeP4_260055000866250---0.012--1.797%
2012-06-23T18:55:00c10ck3rManual testing100000030000000---0.318--6.031%
2020-06-28T11:22:08mikrMSI4000000150000000122995.7931.4750.5522.9518.773%
2021-01-14T13:16:35Jocelyn LaroucheManual testing324520324520---0.040--1.595%
2021-01-16T17:21:44Jocelyn LaroucheManual testing32452032452016---0.060--3.389%
2022-01-06T11:34:10Jocelyn LaroucheManual testing1561300116447100---0.965--7.833%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-08-18T00:00:00ANONYMOUSv4_computers21260--0.047--
2009-04-04T22:21:00S485122USB-A260261--0.047--
2011-07-24T20:30:00Carsten KossendeyManual testing261262--0.095--
2012-09-24T04:51:00Richard B. WoodsPuttputt262263--0.302--
2012-11-02T13:27:00Richard B. WoodsPuttputt263264--0.605--
2013-11-15T13:12:00David CampeauManual testing264265--1.151--
2015-06-24T21:57:00ThaManual testing265266--2.303--
2017-03-27T22:26:22Gordon SpenceManual testing266267--4.605--
2018-11-05T15:44:34TJAOIManual testing267268--9.211--


ECM factoring results:

Old Calculation Method

Total ECM effort:1.766 GHz-days
Estimated T-Level:0.750
DigitsB1CurvesCompleteFacMiss
201100015 / 1000.15086.006%
255000015 / 2800.05494.775%

New Calculation Method

Total ECM effort:1.766 GHz-days
Estimated T-Level:0.750
DigitsB1CompleteFacMiss
20110000.48461.639%
25500000.04495.721%
302500000.00399.731%


ECM Summary

B1B2factorcurvesGHz-days
500005000000151.766


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-02-24T00:00:00ANONYMOUSv4_computers8A045EA33ED652010.276
1998-07-05T00:00:00ANONYMOUSv4_computers8A045EA33ED652010.276
1999-06-15T00:00:00ANONYMOUSv4_computers8A045EA33ED652010.276


PRP results:
dateuseridcompidcofactorsres64PRP
2020-07-02T14:57:52mnd9mnd
68627362943103954226265595703
C6993C94B64BD3F8no
2020-08-08T09:50:09Justine V.Gible_Desktop_1
68627362943103954226265595703
C6993C94B64BD3F8no


P-1 factor-bounds graph:
B1 = 4000000, B2 = 150000000 (P-1 stage 2)
B1 = 1561300, B2 = 116447100 (P-1 stage 2)
B1 = 4000000 (P-1 stage 1)
B1 = 1000000, B2 = 30000000 (P-1 stage 2)
B1 = 1561300 (P-1 stage 1)
B1 = 1000000 (P-1 stage 1)
B1 = 324520, B2 = 3245201 (P-1 stage 2)
B1 = 324520 (P-1 stage 1)
B1 = 55000, B2 = 866250 (P-1 stage 2)
B1 = 55000 (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: 2022-01-06T11:34:10+00:00