is 2 4763089 - 1
has 1433833 decimal digits
takes 0.627 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LDDD1F3F9AE8B85C3double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2676.238465.6716 %2400001190487901.28167.1227 %7.520068.1168 %
Target2651.531764.6154 %3000032500000.03922.2837 %1.570965.4235 %
Difference+2+4.7067+1.0563 %+210000+115798790+1.2424+4.8391%+5.9491+2.6933 %

Known prime factors (1 factor, 63.0 bits, 0.00132338% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
476308994421003925479576331963.034991174046144
26 × 1787 × 8666533
2010-05-19178786665330.67630.09050.1684

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2009-09-05Carsten Kossendeymother30000412500--0.0102.026%
2023-03-19USAFSS6917th_Scty_Sq240000119048790
skipped known factor: 9442100392547957633
--1.5378.572%


Trial Factoring results:
5758596061626364656667
No TF results for M4763089


ECM factoring results:
Total ECM effort:0.263 GHz-days
DigitsB1CompleteFacMiss


ECM Summary

B1B2factorcurvesGHz-days
10.263


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-10-18ANONYMOUSv4_computersDDD1F3F9AE8B85C30.627
2000-02-09ANONYMOUSv4_computersDDD1F3F9AE8B85C30.627


PRP results:
dateuseridcompidcofactorsres64
2017-09-20kkmrkkblmbrbkManual testing
9442100392547957633
52B5699F9CD41262
2018-03-17ATHec2-PRPCFDC
9442100392547957633
52B5699F9CD41262


CERT results:
No CERT results for M4763089


P-1 factor-bounds graph:
B1 = 240000, B2 = 119048790 (P-1 stage 2)
B1 = 240000 (P-1 stage 1)
B1 = 30000, B2 = 412500 (P-1 stage 2)
B1 = 30000 (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
250
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Last modified: 2024-03-13T02:15:48+00:00