is 2 2996489 - 1
has 902034 decimal digits
takes 0.255 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LF139607B25D8F8F4double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26819.891667.6471 %3000000900000000.95527.8896 %20.846870.1996 %
Target2641.187865.6250 %1300010000000.00821.3866 %1.196166.1016 %
Difference+4+18.7037+2.0221 %+2987000+89000000+0.9470+6.5030%+19.6507+4.0979 %

Known prime factors (1 factor, 74.5 bits, 0.00248490% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
2996489259777099559706525451512374.4604334691359783175
3 × 52 × 1061 × 54473029969
2021-01-281061544730299691,276.8366.26684.08

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2003-12-13ANONYMOUSv4_computers2048204800--0.0020.569%
2003-12-23Team Prime Ribv4_computers1000010000--0.0010.313%
2010-10-20markrtiny11000023925006--0.0294.166%
2016-08-21JossManual testing14000047850006--0.0494.972%
2016-12-23JossManual testing201600201600---2.079%
2017-02-25JossManual testing29030429030406---4.893%
2017-03-19JossManual testing34836434836406--0.0645.183%
2019-10-31BigBrotherWinston30000009000000012--0.95510.791%


Trial Factoring results:
575859606162636465666768
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-08-07ANONYMOUSv4_computers212600.026
2009-02-13Sturle Sundeklengel.ifi2602610.051
2011-11-27markroldgamer2612620.103
2013-01-07dbaughManual testing2622630.328
2015-02-02lycornManual testing2632640.655
2015-02-02lycornManual testing2642651.247
2016-02-24ramgeisManual testing2652662.494
2017-12-07Gordon SpenceManual testing2662674.988
2018-12-30chuenkitManual testing2672689.98


ECM factoring results:
Total ECM effort:5.700 GHz-days
Estimated T-Level:20.890
DigitsB1CompleteFacMiss
20110001.92314.616%
25500000.17883.700%
302500000.01198.884%


ECM Summary

B1B2factorcurvesGHz-days
500005000000455.119
50000500000050.581


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-12-01ANONYMOUSv4_computersF139607B25D8F8F40.255
2018-10-23kkmrkkblmbrbkoldF139607B25D8F8F40.255


PRP results:
dateuseridcompidcofactorsres64
2021-01-29mrhw
25977709955970652545151
61B854810C4C1B82


CERT results:
dateuseridcompid
2021-01-29curtiscwcm202--44l


P-1 factor-bounds graph:
B1 = 3000000, B2 = 90000000 (P-1 stage 2)
B1 = 3000000 (P-1 stage 1)
B1 = 348364, B2 = 3483640 (P-1 stage 2)
B1 = 290304, B2 = 2903040 (P-1 stage 2)
B1 = 140000, B2 = 4785000 (P-1 stage 2)
B1 = 348364 (P-1 stage 1)
B1 = 290304 (P-1 stage 1)
B1 = 110000, B2 = 2392500 (P-1 stage 2)
B1 = 201600 (P-1 stage 1)
B1 = 140000 (P-1 stage 1)
B1 = 110000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 10000 (P-1 stage 1)
B1 = 2048 (P-1 stage 1)
102
103
104
105
106
107
102
103
104
105
106
107
108
109
1010
1011
TF factor-bounds graph:
268
267
266
265
264
263
262
261
260
this exponent TF target: 64
TF double-checked to: 67
ECM T-Level=20.89 ~= 53-bit
250
260
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Last modified: 2024-02-29T14:28:04+00:00