is 2 12005341 - 1
has 3613968 decimal digits
takes 4.622 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LE048E4146F959783double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual27279.659066.6667 %120000086733150027.01338.1553 %106.672369.3851 %
Target2684.964964.7059 %80000100000000.34642.9413 %5.311265.7440 %
Difference+4+74.6942+1.9608 %+1120000+857331500+26.6669+5.2140%+101.3611+3.6411 %

Known prime factors (1 factor, 75.0 bits, 0.00062497% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
12005341385792207508746537876312375.0301606752392575715
5 × 7 × 11 × 23 × 149 × 179 × 6803323
2021-12-0217968033231,221.60.20700.3865

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2012-03-10Squeeky_SquirrelP4_260023000056350006--0.2934.349%
2021-12-02lycornsupernova120000086733150022375.03031.1311.184%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2022-01-01riccardo ubertiColab_noGPU1515000003000000027--2.122
2022-01-29riccardo ubertiColab_noGPU1520000004000000065--2.830


Trial Factoring results:
57585960616263646566676869707172
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2000-02-16David Barleyv4_computers212640.164
2013-08-27TharsisManual testing2642650.311
2013-10-05NesowaManual testing2652660.622
2015-02-01ThaManual testing2662671.245
2015-02-03ThaManual testing2672682.490
2017-10-02mikrManual testing2682694.980
2018-01-04_p95holder_Manual testing2692709.96
2020-11-30mikrManual testing27027119.92
2021-10-29ANONYMOUSManual testing27127239.84


ECM factoring results:
Total ECM effort:14.843 GHz-days
Estimated T-Level:3.654
DigitsB1CompleteFacMiss
20110000.73148.154%
25500000.07093.271%
302500000.00499.554%


ECM Summary

B1B2factorcurvesGHz-days
50000500000063.513
50000144000001011.33


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2004-07-13ANONYMOUSv4_computersE048E4146F9597834.622


PRP results:
dateuseridcompidcofactorsres64
2021-12-23riccardo ubertiNomad2C
38579220750874653787631
E4DFAB13D14E36FB


CERT results:
dateuseridcompid
2021-12-23Sharks_w_Lasersgear-05


P-1 factor-bounds graph:
B1 = 1200000, B2 = 867331500 (P-1 stage 2)
B1 = 1200000 (P-1 stage 1)
B1 = 230000, B2 = 5635000 (P-1 stage 2)
B1 = 230000 (P-1 stage 1)
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102
103
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105
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107
101
102
103
104
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109
TF factor-bounds graph:
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271
270
269
268
267
266
265
264
this exponent TF target: 68
TF double-checked to: 67
ECM T-Level=3.65 ~= -4-bit
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Last modified: 2024-03-13T02:15:48+00:00