is 2 12384539 - 1
has 3728118 decimal digits
takes 4.768 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L84871FD42097F3D0double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2699.640065.2174 %4000002662705508.30987.9183 %17.949767.9716 %
Target2684.812864.7059 %90000110000000.38213.0861 %5.194965.7951 %
Difference+1+4.8271+0.5115 %+310000+255270550+7.9277+4.8322%+12.7548+2.1765 %

Known prime factors (1 factor, 69.2 bits, 0.00055850% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
123845396631366580937805956892169.16826772763123996
22 × 113 × 9349 × 6335627
2018-12-259349633562711.1780.19760.3599

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2001-05-27mhoneyv4_computers1500001987500--0.1403.276%
2018-12-25riccardo ubertiNomad2C43000085000001222169.1680.4855.112%
2022-02-18nordisweet16_30.8b10400000400000--0.2232.151%
2022-03-02riccardo ubertiColab_noGPU12150000030000000
skipped known factor: 663136658093780595689
--1.7047.227%
2022-03-06nordisweet16_30.8b10400000266270550
skipped known factor: 663136658093780595689
--10.348.644%


Trial Factoring results:
57585960616263646566676869
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2000-08-24ANONYMOUSv4_computers212640.159
2013-07-21lycornManual testing2642650.302
2013-09-18NesowaManual testing2652660.603
2015-03-14ThaManual testing2662671.207
2015-08-05ThaManual testing2672682.414
2017-11-13ramgeisManual testing2682694.827


ECM factoring results:
Total ECM effort:12.502 GHz-days
Estimated T-Level:2.885
DigitsB1CompleteFacMiss
20110000.57756.162%
25500000.05594.608%
302500000.00499.643%


ECM Summary

B1B2factorcurvesGHz-days
50000500000021.171
50000144000001011.33


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2001-06-30mhoneyv4_computers84871FD42097F3D04.768
2004-10-03ANONYMOUSv4_computers84871FD42097F3D04.768


PRP results:
dateuseridcompidcofactorsres64
2018-12-27riccardo ubertiTuareg4C
663136658093780595689
BE7E5F8F888CFAB5
2021-02-08JaytholomewJaytholomew
663136658093780595689
BE7E5F8F888CFAB5


CERT results:
dateuseridcompid
2021-02-08curtiscwcm202--16l


P-1 factor-bounds graph:
B1 = 400000, B2 = 266270550 (P-1 stage 2)
B1 = 1500000, B2 = 30000000 (P-1 stage 2)
B1 = 1500000 (P-1 stage 1)
B1 = 430000, B2 = 8500000 (P-1 stage 2)
B1 = 430000 (P-1 stage 1)
B1 = 400000 (P-1 stage 1)
B1 = 150000, B2 = 1987500 (P-1 stage 2)
B1 = 150000 (P-1 stage 1)
102
103
104
105
106
107
102
103
104
105
106
107
108
109
TF factor-bounds graph:
269
268
267
266
265
264
this exponent TF target: 68
TF double-checked to: 67
ECM T-Level=2.88 ~= -7-bit
250
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Last modified: 2024-03-13T02:15:48+00:00