is 2 11451667 - 1
has 3447296 decimal digits
takes 4.409 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LC602EBEAA0BC5C33double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2672.594764.1791 %14000024150000.14733.7468 %2.742165.5212 %
Target2685.204964.7059 %8000095000000.33122.8866 %5.536165.7247 %
Difference-1-2.6102-0.5268 %+60000-7085000-0.1838+0.8602%-2.7940-0.2035 %

Known prime factors (2 factors, 137.2 bits, 0.00119788% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
114516671467470388569619629592166.9926407234809437
3 × 7 × 112 × 17 × 148325921
2021-03-171211483259211.28964.51148.4259
1145166713424407077031502789532270.18558613331478428
22 × 32 × 1628148096623
2015-11-139162814809662320.86649,52092,490

1 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2000-11-15ANONYMOUSv4_computers1400002415000--0.1473.356%


Trial Factoring results:
575859606162636465666768
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2000-03-27PHeedev4_computers212640.171
2013-11-16lycornManual testing2642650.326
2015-02-25NesowaManual testing2652660.653
2021-03-17TJAOIManual testing266267*
66.992
21
1.295


ECM factoring results:
Total ECM effort:0.585 GHz-days
Estimated T-Level:0.192
DigitsB1CompleteFacMiss
20110000.03896.227%
25500000.00499.645%


ECM Summary

B1B2factorcurvesGHz-days
50000500000010.585


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2001-06-30ANONYMOUSv4_computersC602EBEAA0BC5C334.409
2001-07-29curtiscv4_computersC602EBEAA0BC5C334.409


PRP results:
dateuseridcompidcofactorsres64
2021-08-01GANLMS-11
1342440707703150278953
146747038856961962959
112B3146547D17AD


CERT results:
dateuseridcompid
2021-08-01curtischum110--26l


P-1 factor-bounds graph:
B1 = 140000, B2 = 2415000 (P-1 stage 2)
B1 = 140000 (P-1 stage 1)
100
101
102
103
104
105
106
100
101
102
103
104
105
106
107
108
109
1010
1011
1012
1013
TF factor-bounds graph:
266
265
264
this exponent TF target: 68
TF double-checked to: 67
ECM T-Level=0.19 ~= -16-bit
250
260
270
280
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Last modified: 2024-02-29T14:28:04+00:00