is 2 7231261 - 1
has 2176827 decimal digits
takes 1.577 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L00991431AD4BE8D4double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual273264.524368.4932%1600000016143964200282.885512.6378%547.409872.4749%3.9818%
Target2674.109165.6716%4500010000000.03072.3121%4.139866.4654%0.7937%
Difference+6+260.4152+2.8215%+15955000+16142964200+282.8548+10.3257%+543.2700+6.0096%+3.1881%

Known prime factors (1 factor, 132.1 bits, 0.00182693% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
7231261587749260769854040135869037158490362964740132.110406394722006199223161678880874643
11 × 17 × 1123 × 1223 × 6763 × 57349 × 12846209 × 317585027
2023-01-01128462093175850271.803e+109.311310.218

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-02-10T00:00:00pgnnv4_computers3500035000---0.011--0.227%
2012-01-18T06:25:00Carsten Kossendeymother46000014030000---0.379--3.239%
2022-11-28T20:58:21yoyorocks1Manual testing160000001614396420040132.110282.93.154565.812.638%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-07-05T00:00:00ANONYMOUSv4_computers21262--0.085--
2002-02-10T00:00:00pgnnv4_computers21263--0.221--
2013-11-03T11:13:00NesowaManual testing263264--0.272--
2013-11-14T12:28:00David CampeauManual testing264265--0.517--
2015-06-16T01:49:00VictordeHollanderManual testing265266--1.033--
2016-10-13T23:59:18Gordon SpenceManual testing266267--2.067--
2018-07-23T10:43:50ramgeisManual testing267268--4.134--
2020-03-27T10:19:01TJAOIManual testing268269--8.267--
2021-08-19T16:11:16SRBaseManual testing269270--16.53--
2021-08-24T16:12:15SRBaseManual testing270271--33.07--
2021-09-28T15:11:03SRBaseManual testing271272--66.14--
2021-12-27T11:35:18-Anonymous-Manual testing272273--132.3--


ECM factoring results:
Total ECM effort:1.989 GHz-days
Estimated T-Level:1.154
DigitsB1CompleteFacMiss
20110000.23179.392%
25500000.02197.887%
302500000.00199.865%


ECM Summary

B1B2factorcurvesGHz-days
50000500000061.989


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-05-02T00:00:00Stephen Woodv4_computers00991431AD4BE8D41.577
2002-03-24T00:00:00pgnnv4_computers00991431AD4BE8D41.577


PRP results:
dateuseridcompidcofactorsres64PRP
2023-01-06T15:03:00Perigbruthcharraig
5877492607698540401358690371584903629647
11E5F5B0C1FF8168no


P-1 factor-bounds graph:
B1 = 16000000, B2 = 16143964200 (P-1 stage 2)
B1 = 16000000 (P-1 stage 1)
B1 = 460000, B2 = 14030000 (P-1 stage 2)
B1 = 460000 (P-1 stage 1)
B1 = 35000 (P-1 stage 1)
103
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108
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1010
1011
TF factor-bounds graph:
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271
270
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250
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2100
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Last modified: 2023-01-06T15:03:00+00:00