is 2 5911127 - 1
has 1779427 decimal digits
takes 1.048 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L16B5A5A0BDD10AA1double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2675.026865.6716 %36000088200000.21105.0842 %5.237767.4170 %
Target2662.498465.1515 %4000040000000.06572.3420 %2.564165.9677 %
Difference+1+2.5284+0.5201 %+320000+4820000+0.1452+2.7422%+2.6736+1.4493 %

Known prime factors (1 factor, 83.3 bits, 0.00140936% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
5911127119796047759396853831672312683.3091013309710309022745
3 × 5 × 19 × 37 × 337 × 89083 × 3200891
2014-11-02890833200891364,7530.06650.0837

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2000-10-07In Memoriam Ernst Wilhelm Mayerv4_computers25000243750--0.0091.506%
2001-06-09ANONYMOUSv4_computers25000243750--0.0091.506%
2001-07-03ANONYMOUSv4_computers25000243750--0.0091.506%
2011-05-02USAFSSP4_26007000011200006--0.0332.851%
2014-11-02Nesowanewfs36000088200001222683.3090.2115.607%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1998-09-06ANONYMOUSv4_computers212620.052
2022-06-22LordJuliusManual testing262263
2014-09-29NesowaManual testing2632640.332
2014-09-30monstManual testing2642650.632


ECM factoring results:
Total ECM effort:0.808 GHz-days
Estimated T-Level:0.577
DigitsB1CompleteFacMiss
20110000.11589.102%
25500000.01198.938%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.808


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-10-04ANONYMOUSv4_computers16B5A5A0BDD10AA11.048
2000-11-25In Memoriam Ernst Wilhelm Mayerv4_computersC97A12ADD6778CD71.048
2001-11-10HBendtzv4_computers16B5A5A0BDD10AA11.048


PRP results:
dateuseridcompidcofactorsres64
2017-09-20kkmrkkblmbrbkManual testing
11979604775939685383167231
A7CCDA9074B791F4
2018-09-11rucio
11979604775939685383167231
A7CCDA9074B791F4


CERT results:
No CERT results for M5911127


P-1 factor-bounds graph:
B1 = 360000, B2 = 8820000 (P-1 stage 2)
B1 = 360000 (P-1 stage 1)
B1 = 70000, B2 = 1120000 (P-1 stage 2)
B1 = 70000 (P-1 stage 1)
B1 = 25000, B2 = 243750 (P-1 stage 2)
B1 = 25000 (P-1 stage 1)
103
104
105
106
103
104
105
106
107
TF factor-bounds graph:
265
264
263
262
this exponent TF target: 66
TF double-checked to: 67
ECM T-Level=0.58 ~= -15-bit
250
260
270
280
290
JSON version of this page
Last modified: 2024-03-13T02:15:48+00:00