is 2 11928589 - 1
has 3590864 decimal digits
takes 4.593 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 L-L tests remaining
ResidueStatus
L-LBA17E3B274150034double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27020.031865.7143%61891071856732108.91419.0081%28.945868.8028%3.0885%
PrimeNet2640.298462.5000%5500015000000.07474.1102%0.373064.0413%1.5413%
GPU722684.996864.7059%8000020000000.10312.9385%5.099965.7430%1.0371%
Difference+2+15.0350+1.0084%+6109107+183673210+8.8110+6.0697%+23.8460+3.0598%+3.0598%

Known prime factors (1 factor, 137.9 bits, 0.00115584% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1192858931960146357386278427090845099488819612960742137.87513396448799345118868246212984406127
3 × 7 × 47 × 61 × 151 × 509 × 1259 × 2371 × 3529 × 3907 × 4561 × 15421817
2021-07-154561154218171.093e+100.47150.8761

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2001-04-08T00:00:00ANONYMOUSv4_computers1400001855000---0.130--2.529%
2001-11-24T00:00:00ANONYMOUSv4_computers180000180000---0.100--1.147%
2019-04-16T23:15:56riccardo ubertiNomad2C430000850000012---0.485--4.180%
2021-07-15T12:59:19LaurVManual testing618910718567321042137.8758.9149.18517.839.008%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2000-02-09T00:00:00ANONYMOUSv4_computers?264--0.165--
2013-10-12T09:24:00lycornManual testing264265--0.313--
2013-10-20T06:14:00NesowaManual testing265266--0.626--
2016-03-05T15:52:13YxinityManual testing266267--1.253--
2018-01-01T21:55:32ramgeisManual testing267268--2.506--
2018-01-01T21:55:32ramgeisManual testing268269--5.012--
2021-05-17T15:55:29lycornManual testing269270--10.02--


ECM factoring results:

Old Calculation Method

Total ECM effort:1.171 GHz-days
Estimated T-Level:0.100
DigitsB1CurvesCompleteFacMiss
20110002 / 1000.02098.010%
25500002 / 2800.00799.287%

New Calculation Method

Total ECM effort:1.171 GHz-days
Estimated T-Level:0.100
DigitsB1CompleteFacMiss
20110000.06593.752%
25500000.00699.419%


ECM Summary

B1B2factorcurvesGHz-days
50000500000021.171


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2002-01-15T00:00:00ANONYMOUSv4_computersBA17E3B2741500344.593
2004-06-12T00:00:00ANONYMOUSv4_computersBA17E3B2741500344.593


PRP results:
Exponent "11928589" not found


P-1 factor-bounds graph:
B1 = 6189107, B2 = 185673210 (P-1 stage 2)
B1 = 6189107 (P-1 stage 1)
B1 = 430000, B2 = 8500000 (P-1 stage 2)
B1 = 430000 (P-1 stage 1)
B1 = 140000, B2 = 1855000 (P-1 stage 2)
B1 = 180000 (P-1 stage 1)
B1 = 140000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2021-07-15T13:04:30+00:00