is 2 4882327 - 1
has 1469727 decimal digits
takes 0.677 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L63E30DD49C2A22E4double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2676.086065.6716 %2560001055220601.20417.0947 %7.290268.1072 %
Target2651.494364.6154 %3200035000000.04442.3726 %1.538765.4549 %
Difference+2+4.5917+1.0563 %+224000+102022060+1.1597+4.7222%+5.7514+2.6522 %

Known prime factors (1 factor, 72.9 bits, 0.00149232% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
488232785721557434414604753912272.860877876035693785
5 × 347 × 2207 × 5419 × 42307
2009-08-25541942307269.870.00150.0022

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2009-08-25Carsten Kossendeymother2272.8600.0100.000%
2023-09-01USAFSS6917th_Scty_Sq256000105522060
skipped known factor: 8572155743441460475391
--1.2048.535%


Trial Factoring results:
5758596061626364656667
No TF results for M4882327


ECM factoring results:
Total ECM effort:0.694 GHz-days
Estimated T-Level:0.577
DigitsB1CompleteFacMiss
20110000.11589.102%
25500000.01198.938%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.694


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2000-05-10ANONYMOUSv4_computers63E30DD49C2A22E40.677


PRP results:
dateuseridcompidcofactorsres64
2017-09-20kkmrkkblmbrbkManual testing
8572155743441460475391
17D1547128B57A68
2018-04-02Oliver KruseGTX-3
8572155743441460475391
17D1547128B57A68


CERT results:
No CERT results for M4882327


P-1 factor-bounds graph:
B1 = 256000, B2 = 105522060 (P-1 stage 2)
B1 = 256000 (P-1 stage 1)
102
103
104
105
106
102
103
104
105
106
107
108
109
TF factor-bounds graph:
this exponent TF target: 65
TF double-checked to: 67
ECM T-Level=0.58 ~= -15-bit
250
260
270
280
JSON version of this page
Last modified: 2024-03-13T02:15:48+00:00