is 2 10880291 - 1
has 3275294 decimal digits
takes 3.554 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LA81EBBA8FA19083Ddouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2672.731064.1791 %12500016250000.09793.3396 %2.828965.3754 %
Target2685.478264.7059 %7000085000000.25072.7197 %5.728965.6658 %
Difference-1-2.7473-0.5268 %+55000-6875000-0.1528+0.6199%-2.9000-0.2904 %

Known prime factors (1 factor, 74.3 bits, 0.00068279% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
10880291230798649519735812306712374.2891060627190576685
3 × 5 × 17 × 263 × 383 × 41292203
2017-01-0938341292203351.631.06581.9903

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2000-11-15ANONYMOUSv4_computers1250001625000--0.0982.982%


Trial Factoring results:
575859606162636465666768
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-11-10Lewis Gordonv4_computers212640.180
2013-12-08lycornManual testing2642650.343
2015-05-18ThaManual testing2652660.687
2015-12-11VictordeHollanderManual testing2662671.374


ECM factoring results:
Total ECM effort:1.011 GHz-days
Estimated T-Level:0.385
DigitsB1CompleteFacMiss
20110000.07792.596%
25500000.00799.291%


ECM Summary

B1B2factorcurvesGHz-days
50000500000010.514
50000500000010.497


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2001-01-21ANONYMOUSv4_computersA81EBBA8FA19083D3.554
2004-04-20ANONYMOUSv4_computersA81EBBA8FA19083D3.554


PRP results:
dateuseridcompidcofactorsres64
2021-03-25krackerGRID-11
23079864951973581230671
C89FB2C37CD7E702
2021-03-29arnaudstm-11-010
23079864951973581230671
C89FB2C37CD7E702


CERT results:
No CERT results for M10880291


P-1 factor-bounds graph:
B1 = 125000, B2 = 1625000 (P-1 stage 2)
B1 = 125000 (P-1 stage 1)
101
102
103
104
105
106
101
102
103
104
105
106
107
108
TF factor-bounds graph:
267
266
265
264
this exponent TF target: 68
TF double-checked to: 67
ECM T-Level=0.38 ~= -15-bit
250
260
270
280
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Last modified: 2024-02-09T03:30:02+00:00