is 2 9833743 - 1
has 2960252 decimal digits
takes 2.868 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L72BED0A3EFD78F41double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2673.021664.1791 %12000023700000.10263.5688 %3.124265.4575 %
Target2686.061364.7059 %6500075000000.19882.5611 %6.260165.6098 %
Difference-1-3.0396-0.5268 %+55000-5130000-0.0962+1.0077%-3.1358-0.1523 %

Known prime factors (1 factor, 70.1 bits, 0.00071252% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
983374312373699821023809604892270.06862914496652108
22 × 32 × 1747624907003
2015-01-299174762490700324.29940,26875,210

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2003-07-30ANONYMOUSv4_computers50000475000--0.0311.795%
2013-03-20NesowaEPC12000023700006--0.1033.190%


Trial Factoring results:
575859606162636465666768
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-07-04ANONYMOUSv4_computers212640.200
2013-08-24NesowaManual testing2642650.380


ECM factoring results:
Total ECM effort:0.444 GHz-days
DigitsB1CompleteFacMiss


ECM Summary

B1B2factorcurvesGHz-days
10.444


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2000-09-23davidcrossv4_computers72BED0A3EFD78F412.868
2003-08-25ANONYMOUSv4_computers72BED0A3EFD78F412.868


PRP results:
dateuseridcompidcofactorsres64
2019-11-07noknonLIB-srv
1237369982102380960489
A599173F2F8948E9
2021-01-05Oliver KruseThreadripper-PC
1237369982102380960489
A599173F2F8948E9


CERT results:
dateuseridcompid
2021-01-05chuenkitCHAIN


P-1 factor-bounds graph:
B1 = 120000, B2 = 2370000 (P-1 stage 2)
B1 = 120000 (P-1 stage 1)
B1 = 50000, B2 = 475000 (P-1 stage 2)
B1 = 50000 (P-1 stage 1)
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TF factor-bounds graph:
265
264
this exponent TF target: 68
TF double-checked to: 67
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Last modified: 2024-02-09T03:30:02+00:00