is 2 1814261 - 1
has 546147 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-L0DB60C17FECD509Edouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26716.378068.6567 %500000150000000.10155.0633 %16.479470.2437 %
Target2610.169365.5738 %90006500000.00351.5569 %0.172866.1097 %
Difference+6+16.2087+3.0829 %+491000+14350000+0.0980+3.5064%+16.3067+4.1340 %

Known prime factors (1 factor, 61.4 bits, 0.00338308% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
181426129962728215338723991961.378825755726859
3 × 72 × 5617385897
2008-09-194956173858970.169324.07544.965

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2016-03-16alpertronManual testing5000001500000012---8.856%


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


ECM factoring results:
Total ECM effort:39.201 GHz-days
Estimated T-Level:25.706
DigitsB1CompleteFacMiss
201100015.2370.000%
25500001.69118.426%
302500000.14186.828%
3510000000.01099.047%


ECM Summary

B1B2factorcurvesGHz-days
10.052
500005000000432.967
50000660000021816.96
250000400000004519.23


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-03-15ANONYMOUSv4_computers0DB60C17FECD509E0.098


PRP results:
dateuseridcompidcofactorsres64
2017-10-03Oliver KruseGTX-1
2996272821533872399
B6685CD7B15189DB
2017-11-05kkmrkkblmbrbkc4.xlarge
2996272821533872399
B6685CD7B15189DB


CERT results:
No CERT results for M1814261


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=25.71 ~= 69-bit
250
260
270
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Last modified: 2024-03-03T02:29:32+00:00