is 2 9020549 - 1
has 2715456 decimal digits
takes 2.493 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LD5C7B4FFABB61ED3double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2673.294064.1791 %107500010750000.43083.3495 %3.724865.3789 %
Target2686.607764.7059 %6000065000000.16472.4007 %6.772365.5532 %
Difference-1-3.3137-0.5268 %+1015000-5425000+0.2662+0.9487%-3.0475-0.1743 %

Known prime factors (1 factor, 67.1 bits, 0.00074334% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
90205491531214442344297191432167.0538487368353879
94993 × 89347303
2014-02-0394993893473033.29401.98693.6437

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2002-07-14Richard B. Woodsv4_computers5000050000--0.0200.686%
2003-02-02Richard B. Woodsv4_computers50000300000--0.0251.535%
2008-06-13Richard B. Woodsv4_computers10750001075000--0.4313.015%


Trial Factoring results:
575859606162636465666768
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1998-12-06mhoneyv4_computers212610.017
1999-01-29ANONYMOUSv4_computers212630.109
2007-04-07Richard B. Woodsv4_computers212650.414


ECM factoring results:
Total ECM effort:0.420 GHz-days
DigitsB1CompleteFacMiss


ECM Summary

B1B2factorcurvesGHz-days
10.420


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2003-03-27ANONYMOUSv4_computersD5C7B4FFABB61ED32.493


PRP results:
dateuseridcompidcofactorsres64
2019-05-24Niels_Mache_NextcloudSuperDry3
153121444234429719143
6C6C3F4FC382420D
2020-10-07marssystemsSystem01
153121444234429719143
6C6C3F4FC382420D


CERT results:
No CERT results for M9020549


P-1 factor-bounds graph:
B1 = 1075000 (P-1 stage 1)
B1 = 50000, B2 = 300000 (P-1 stage 2)
B1 = 50000 (P-1 stage 1)
103
104
105
106
107
103
104
105
106
107
108
TF factor-bounds graph:
265
263
261
this exponent TF target: 68
TF double-checked to: 67
250
260
270
JSON version of this page
Last modified: 2024-03-03T02:29:32+00:00