is 2 1807711 - 1
has 544176 decimal digits
takes 0.098 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L22CA2CC1B44506E7double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26716.437368.6567 %500000150000000.10155.0611 %16.538870.2430 %
Target2610.169965.5738 %90006500000.00351.5557 %0.173466.1093 %
Difference+6+16.2674+3.0829 %+491000+14350000+0.0980+3.5054%+16.3654+4.1337 %

Known prime factors (1 factor, 62.9 bits, 0.00348013% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
180771186701342156220921111962.9112398097432505
3 × 5 × 59 × 2709714613
2008-09-215927097146130.339911.61321.690

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2016-03-16alpertronManual testing5000001500000012---8.853%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2003-01-16ANONYMOUSv4_computers212580.021


ECM factoring results:
Total ECM effort:38.703 GHz-days
Estimated T-Level:25.716
DigitsB1CompleteFacMiss
201100014.7850.000%
25500001.68018.633%
302500000.14386.658%
3510000000.01099.013%


ECM Summary

B1B2factorcurvesGHz-days
10.052
50000500000025717.73
250000400000004920.92


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-12-21ANONYMOUSv4_computers22CA2CC1B44506E70.098


PRP results:
dateuseridcompidcofactorsres64
2017-10-03Oliver KruseGTX-3
8670134215622092111
3B94C4CEB76D2875
2017-11-05kkmrkkblmbrbkold
8670134215622092111
3B94C4CEB76D2875


CERT results:
No CERT results for M1807711


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
100
101
102
103
104
105
106
100
101
102
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
258
this exponent TF target: 61
TF double-checked to: 67
ECM T-Level=25.72 ~= 69-bit
250
260
270
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Last modified: 2024-03-03T02:29:32+00:00