is 2 100741 - 1
has 30327 decimal digits
takes 0.000 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L56A9D344FA1DFB18double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual267294.953674.6269%100000000065475093984301,152.498325.4509%1,447.451981.0845%
Target2440.000061.3636%1200180000.00004.1541%0.000062.9686%
Difference+23+294.9535+13.2632%+999998800+6547509380430+1,152.4983+21.2967%+1,447.4519+18.1159%

Known prime factors (1 factor, 82.9 bits, 0.08227164% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
10074189073576552369673959527292582.88144209198118129497404
22 × 3 × 7 × 67 × 487 × 16129822476839
2009-03-224871612982247683914,318,7732,831.75,288.8

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2000-11-25ANONYMOUSv4_computers100000025000000---0.007--4.289%
2002-06-02ANONYMOUSv4_computers327683276800---0.001--1.315%
2002-07-20ANONYMOUSv4_computers655366553600---0.001--1.925%
2003-02-02ANONYMOUSv4_computers13107213107200---0.003--2.662%
2003-09-21ANONYMOUSv4_computers26214426214400---0.005--3.517%
2016-10-31kkmrkkblmbrbkManual testing100000000200000000012---0.656--11.730%
2021-12-17Seth_TrManual testing10000000006547509398430---1,152--25.451%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-09-14ANONYMOUSv4_computers252253--0.006--
1999-12-30ANONYMOUSv4_computers253254--0.012--
2000-12-07ANONYMOUSv4_computers21255--0.048--
2000-12-07ANONYMOUSv4_computers21256--0.095--
2000-12-14ANONYMOUSv4_computers21256--0.095--
2002-04-20ANONYMOUSv4_computers21257--0.191--
2018-10-25J.R. AllenManual testing252257--0.185--
2022-04-13LordJuliusManual testing21257--0.191--
2022-03-07LordJuliusManual testing257258--0.191--
2009-01-05Sturle Sundeginglo.ifi258259--0.381--
2022-04-13LordJuliusManual testing258259--0.381--
2009-01-24Sturle Sundegonzo.ifi259260--0.762--
2022-04-13LordJuliusManual testing259260--0.762--
2022-04-13LordJuliusManual testing260261--1.525--
2022-04-13LordJuliusManual testing261262--3.049--
2022-10-24LordJuliusManual testing262263--9.74--
2022-10-24LordJuliusManual testing263264--19.49--
2022-10-24LordJuliusManual testing264265--37.09--
2022-10-24LordJuliusManual testing265266--74.18--
2022-10-24LordJuliusManual testing266267--148.4--


ECM factoring results:
Total ECM effort:11.229 GHz-days
Estimated T-Level:30.701
DigitsB1CompleteFacMiss
201100065.9370.000%
255000011.0190.002%
302500001.38125.131%
3510000000.14086.919%
4030000000.01298.805%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
500005000000220.051
250000250000005075.885
10000001000000001145.293


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1997-01-01Robert Clark56A9D344FA1DFB180.000


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-21Oliver KruseOliver-PC
8907357655236967395952729
71D0D3DBB5C9E8__no
2017-09-21Oliver KruseManual testing
8907357655236967395952729
71D0D3DBB5C9E8__no
2017-09-22Oliver KruseManual testing
8907357655236967395952729
71D0D3DBB5C9E8__no
2017-11-06kkmrkkblmbrbkc4.xlarge
8907357655236967395952729
71D0D3DBB5C9E8__no
2020-04-17Oliver KruseAddPrpType5
8907357655236967395952729
CD268B2C69AC18__no
2022-04-15LordJuliusWhiteBox
8907357655236967395952729
CD268B2C69AC188Bno


P-1 factor-bounds graph:
B1 = 1000000000, B2 = 6547509398430 (P-1 stage 2)
B1 = 1000000000 (P-1 stage 1)
B1 = 100000000, B2 = 2000000000 (P-1 stage 2)
B1 = 100000000 (P-1 stage 1)
B1 = 1000000, B2 = 25000000 (P-1 stage 2)
B1 = 262144, B2 = 26214400 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
B1 = 131072, B2 = 13107200 (P-1 stage 2)
B1 = 65536, B2 = 6553600 (P-1 stage 2)
B1 = 262144 (P-1 stage 1)
B1 = 32768, B2 = 3276800 (P-1 stage 2)
B1 = 131072 (P-1 stage 1)
B1 = 65536 (P-1 stage 1)
B1 = 32768 (P-1 stage 1)
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1010
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TF factor-bounds graph:
267
266
265
264
263
262
261
260
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258
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255
254
253
this exponent TF target: 44
TF double-checked to: 67.7
ECM T-Level=30.7 ~= 85-bit
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Last modified: 2023-03-23T17:39:31+00:00