is 2 1862933 - 1
has 560799 decimal digits
takes 0.101 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LB82FA12D80AA90F6double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26831.995269.1176 %24883202049226301.06338.3859 %33.058571.7074 %
Target2610.164965.5738 %100007500000.00401.6884 %0.168866.1550 %
Difference+7+31.8303+3.5439 %+2478320+204172630+1.0594+6.6975%+32.8897+5.5524 %

Known prime factors (2 factors, 162.6 bits, 0.00873077% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1862933985885945939768517367772376.38426460585161671636
22 × 47 × 140747793413147
2019-12-03471407477934131479,950.5603,2101,126,628
1862933929404466439427179385444312686.26524944656260837807355
5 × 5743 × 3640781 × 238602037
2024-01-09364078123860203711,243,6551.29341.9099

1 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2012-01-06markrtiny275000600000012--0.0467.178%
2015-10-07Bruno Victal5820K.ECM5000001500000012--0.1018.882%
2016-10-29JossManual testing720000720000---4.463%
2016-12-30JossManual testing864000864000---4.735%
2017-01-14JossManual testing10368001036800---5.014%
2017-02-19JossManual testing12441601244160012--0.1469.120%
2017-12-27JossManual testing24883202488320012--0.29210.578%
2018-02-10JossManual testing24883204976640012--0.39811.784%
2018-02-26JossManual testing24883209953280012--0.61212.972%
2018-09-13JossManual testing248832018629330012--0.98314.032%
2018-10-25JossManual testing248832020492263012--1.06314.192%


Trial Factoring results:
575859606162636465666768
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2003-01-09ANONYMOUSv4_computers212580.021
2010-04-06Architects CubedManual testing2602610.082
2011-03-08GrunwalderGIMPManual testing212630.857
2016-02-23Mark RoseManual testing2582630.754
2015-05-07snme2pm1Manual testing2632653.060
2015-09-10ramgeisManual testing2652664.011
2018-04-30TJAOIManual testing2662678.023
2019-06-24TJAOIManual testing26726816.05


ECM factoring results:
Total ECM effort:39.256 GHz-days
Estimated T-Level:25.710
DigitsB1CompleteFacMiss
201100014.9910.000%
25500001.68118.612%
302500000.14286.756%
3510000000.01099.030%


ECM Summary

B1B2factorcurvesGHz-days
500005000030.126
500005000000573.839
50000500000010.069
50000660000019315.06
250000400000003816.30
2500004000000093.860


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-12-13ANONYMOUSv4_computersB82FA12D80AA90F60.101
2015-06-27MadPooManual testingB82FA12D80AA90F60.101


PRP results:
dateuseridcompidcofactorsres64
2019-12-03mrhx
98588594593976851736777
4DAF595DF785BAA8
2019-12-04marssystemssystem03
98588594593976851736777
4DAF595DF785BAA8
2024-01-09Naegi Makoto5950X
98588594593976851736777
92940446643942717938544431
4DAF595DF785BAA8


CERT results:
dateuseridcompid
2024-01-09Schnell LabHoneysuckle


P-1 factor-bounds graph:
B1 = 2488320, B2 = 204922630 (P-1 stage 2)
B1 = 2488320, B2 = 186293300 (P-1 stage 2)
B1 = 2488320, B2 = 99532800 (P-1 stage 2)
B1 = 2488320, B2 = 49766400 (P-1 stage 2)
B1 = 2488320, B2 = 24883200 (P-1 stage 2)
B1 = 2488320 (P-1 stage 1)
B1 = 1244160, B2 = 12441600 (P-1 stage 2)
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 1244160 (P-1 stage 1)
B1 = 1036800 (P-1 stage 1)
B1 = 864000 (P-1 stage 1)
B1 = 720000 (P-1 stage 1)
B1 = 275000, B2 = 6000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 275000 (P-1 stage 1)
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TF factor-bounds graph:
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267
266
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258
this exponent TF target: 61
TF double-checked to: 67
ECM T-Level=25.71 ~= 69-bit
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Last modified: 2024-03-13T02:15:48+00:00