is 2 1807171 - 1
has 544013 decimal digits
takes 0.098 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
-unknown- primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26716.442268.6567%500000150000000.10155.0609%16.543770.2430%1.5863%
PrimeNet2570.010663.1579%80001500000.00122.8723%0.011964.2161%1.0582%
GPU722610.170065.5738%90001300000.00121.5556%0.171266.1093%0.5355%
Difference+6+16.2722+3.0829%+491000+14870000+0.1002+3.5053%+16.3725+4.1337%+4.1337%

Known prime factors (2 factors, 106.5 bits, 0.00589488% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
180717146353685459238891652.0421282493064
23 × 3 × 23 × 31 × 149 × 503
-1495030.00061.324e-52.385e-5
1807171252825450527404871754.4896995061633
3 × 7 × 83 × 379 × 10589
2014-11-25379105890.00217.357e-58.473e-5

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
180717111719391409837688475401277079394333106.531
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-16T12:36:34alpertronManual testing5000001500000012-
skipped known factor: 4635368545923889
skipped known factor: 25282545052740487
--0.101--5.061%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2014-11-25T12:48:00TJAOIManual testing254255*54.489170.0010.2070.002


ECM factoring results:

Old Calculation Method

Total ECM effort:17.795 GHz-days
Estimated T-Level:24.607
DigitsB1CurvesCompleteFacMiss
2011000258 / 1002.5807.480%
2550000258 / 2800.92139.729%

New Calculation Method

Total ECM effort:17.795 GHz-days
Estimated T-Level:24.607
DigitsB1CompleteFacMiss
20110009.9230.005%
25500000.91839.926%
302500000.05894.373%
3510000000.00399.730%


ECM Summary

B1B2factorcurvesGHz-days
50000500000025817.79


Lucas-Lehmer results:
No L-L results for M1807171


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-03T20:09:50Oliver KruseGTX-0
4635368545923889
25282545052740487
695A2E082CB8B0__no
2017-11-05T15:35:09kkmrkkblmbrbkc4.xlarge
4635368545923889
25282545052740487
695A2E082CB8B0__no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
101
102
103
104
105
106
101
102
103
104
105
106
107
108
TF factor-bounds graph:
267
255
250
260
270
280
290
2100
Last modified: 2021-02-19T17:10:25+00:00