is 2 1851769 - 1
has 557439 decimal digits
takes 0.100 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L382308BD2F64D9C8double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26716.046268.6567 %500000150000000.10155.0758 %16.147770.2476 %
Target2610.165965.5738 %90007500000.00391.6313 %0.169866.1354 %
Difference+6+15.8803+3.0829 %+491000+14250000+0.0976+3.4445%+15.9779+4.1123 %

Known prime factors (2 factors, 146.6 bits, 0.00791714% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
185176916029382096024760171960.475432812680632
23 × 32 × 1381 × 4352851
2008-10-24138143528510.08290.01880.0348
1851769847725348985269486024150472686.13222889608503686731067
83 × 1642309 × 167921149861
2021-10-0716423091679211498618,462,973719.791,344.1

1 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2016-03-16alpertronManual testing5000001500000012
skipped known factor: 1602938209602476017
---8.876%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2003-01-16ANONYMOUSv4_computers212580.021


ECM factoring results:
Total ECM effort:38.676 GHz-days
Estimated T-Level:25.690
DigitsB1CompleteFacMiss
201100015.0920.000%
25500001.66518.916%
302500000.13887.103%
3510000000.00999.075%


ECM Summary

B1B2factorcurvesGHz-days
10.155
500005000000392.697
50000660000016512.87
500006600000513.977
50000675000070.552
250000400000004318.43


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-12-13ANONYMOUSv4_computers382308BD2F64D9C80.100


PRP results:
dateuseridcompidcofactorsres64
2017-10-04Oliver KruseGTX-0
1602938209602476017
760FBDA015823A50
2017-11-07kkmrkkblmbrbkold
1602938209602476017
760FBDA015823A50
2021-10-09SRJ2877LTOS
1602938209602476017
84772534898526948602415047
E4A1A88AD717B090
2021-10-09JackBlockHome_Intel_C_i5_6500
1602938209602476017
84772534898526948602415047
E4A1A88AD717B090


CERT results:
dateuseridcompid
2021-10-09Gregescatter11
2021-10-09Team_InspectorMeat


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
102
103
104
105
106
107
102
103
104
105
106
107
108
109
1010
1011
1012
TF factor-bounds graph:
258
this exponent TF target: 61
TF double-checked to: 67
ECM T-Level=25.69 ~= 69-bit
250
260
270
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290
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Last modified: 2024-03-03T02:29:32+00:00