is 2 2469989 - 1
has 743541 decimal digits
takes 0.171 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26712.030067.1642 %7200007128576003.97469.6336 %16.004670.3275 %
Target2630.646265.0794 %110008000000.00541.3787 %0.651665.5608 %
Difference+4+11.3838+2.0848 %+709000+712057600+3.9692+8.2549%+15.3530+4.7667 %

Known prime factors (2 factors, 99.0 bits, 0.00400686% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
2469989118559473926.82124
23 × 3
-883.638e-128.046e-71.637e-6
246998952320560205573682384332272.1481059125368687344
24 × 32 × 7 × 2549 × 2719 × 151603
2018-10-022719151603499.840.00110.0016

1 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2018-10-03alpertronlaptop22000000200000012272.1480.2015.188%
2022-08-27USAFSS6917th_Scty_Sq720000712857600
skipped known factor: 118559473
skipped known factor: 5232056020557368238433
--4.31313.189%


Trial Factoring results:
5758596061626364656667
No TF results for M2469989


ECM factoring results:
Total ECM effort:22.110 GHz-days
Estimated T-Level:21.261
DigitsB1CompleteFacMiss
20110002.6157.314%
25500000.25277.707%
302500000.01698.383%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.275
50000438709245021.83


Lucas-Lehmer results:
No L-L results for M2469989


PRP results:
dateuseridcompidcofactorsres64
2017-10-14Oliver KruseGTX-0
118559473
ACC190CEA07B0B32
2017-11-29ATHec2-1xh
118559473
ACC190CEA07B0B32
2018-10-05Oliver KruseGTX-7
118559473
5232056020557368238433
ACC190CEA07B0B32


CERT results:
No CERT results for M2469989


P-1 factor-bounds graph:
B1 = 720000, B2 = 712857600 (P-1 stage 2)
B1 = 2000000 (P-1 stage 1)
B1 = 720000 (P-1 stage 1)
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107
100
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105
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109
TF factor-bounds graph:
this exponent TF target: 63
TF double-checked to: 67
ECM T-Level=21.26 ~= 54-bit
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JSON version of this page
Last modified: 2024-03-13T02:15:48+00:00