is 2 4039663 - 1
has 1216060 decimal digits
takes 0.504 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L11D817ADFBCD4607double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2677.355567.1642 %2250001197768001.21866.9218 %8.574269.4370 %
Target2651.806066.1538 %2200018000000.02151.7523 %1.827566.7469 %
Difference+2+5.5495+1.0103 %+203000+117976800+1.1971+5.1695%+6.7467+2.6901 %

Known prime factors (2 factors, 156.3 bits, 0.00386814% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
403966343369495200031578996012271.877536795955504600
23 × 3 × 52 × 11 × 41 × 43 × 1063 × 43399
-106343399186.000.00060.0008
4039663252167566282747917404317932684.3833121146074347636392
23 × 32 × 14629 × 197677 × 14990317
2022-09-04197677149903171,224,2780.18150.2759

1 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2022-09-04USAFSS6917th_Scty_Sq22500011977680022684.3831.2868.346%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1998-08-16ANONYMOUSv4_computers212610.038


ECM factoring results:
Total ECM effort:0.541 GHz-days
Estimated T-Level:0.577
DigitsB1CompleteFacMiss
20110000.11589.102%
25500000.01198.938%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.541


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-10-29ANONYMOUSv4_computers11D817ADFBCD46070.504
1999-10-15ANONYMOUSv4_computers11D817ADFBCD46070.504


PRP results:
dateuseridcompidcofactorsres64
2017-09-20kkmrkkblmbrbkManual testing
4336949520003157899601
E26B000009EDB0A7
2018-01-07Oliver KruseGTX-7
4336949520003157899601
E26B000009EDB0A7
2022-09-10Poaotencent-CNsh
4336949520003157899601
25216756628274791740431793
E8F6B1581CE3B59B


CERT results:
dateuseridcompid
2022-09-10Team_InspectorFishbeck


P-1 factor-bounds graph:
B1 = 225000, B2 = 119776800 (P-1 stage 2)
B1 = 225000 (P-1 stage 1)
102
103
104
105
106
102
103
104
105
106
107
108
109
TF factor-bounds graph:
261
this exponent TF target: 65
TF double-checked to: 67
ECM T-Level=0.58 ~= -15-bit
250
260
270
280
290
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Last modified: 2024-03-13T02:15:48+00:00