is 2 1653383 - 1
has 497718 decimal digits
takes 0.078 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L0695C64C58328DC9double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26717.971668.6567 %500000150000000.08805.0069 %18.059670.2261 %
Target2610.185865.5738 %70003500000.00181.1516 %0.187565.9702 %
Difference+6+17.7858+3.0829 %+493000+14650000+0.0863+3.8553%+17.8721+4.2558 %

Known prime factors (2 factors, 141.1 bits, 0.00853414% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
16533838310189123957338902332169.493251308653952452
22 × 3 × 23 × 53 × 3347 × 5132947
2008-05-243347513294772.2080.01930.0356
165338336004134091327665496392271.6091088801992379493
33 × 7 × 53 × 157 × 692327497
2019-12-09157692327497289.152.57404.8076

1 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2016-03-17alpertronManual testing5000001500000012
skipped known factor: 831018912395733890233
---8.768%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2003-05-11ANONYMOUSv4_computers212580.023


ECM factoring results:
Total ECM effort:83.627 GHz-days
Estimated T-Level:25.908
DigitsB1CompleteFacMiss
201100015.7880.000%
25500001.97013.952%
302500000.18283.392%
3510000000.01498.638%


ECM Summary

B1B2factorcurvesGHz-days
10.155
50000500000023616.12
500005000000120.820
2500002100010425066.53


Lucas-Lehmer results:
No L-L results for M1653383


PRP results:
dateuseridcompidcofactorsres64
2017-10-02Oliver KruseGTX-1
831018912395733890233
04AC73866F376E36
2017-11-02Chang Chia-Tchehomura
831018912395733890233
04AC73866F376E36
2019-12-10Niels_Mache_NextcloudSuperDry-X
831018912395733890233
3600413409132766549639
673C1332B3AB0E29
2019-12-11krackerGRID-11
831018912395733890233
3600413409132766549639
673C1332B3AB0E29


CERT results:
No CERT results for M1653383


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
101
102
103
104
105
106
101
102
103
104
105
106
107
108
109
TF factor-bounds graph:
258
this exponent TF target: 61
TF double-checked to: 67
ECM T-Level=25.91 ~= 69-bit
250
260
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280
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Last modified: 2024-03-03T02:29:32+00:00