is 2 4477199 - 1
has 1347772 decimal digits
takes 0.558 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L21633647BC0DD210double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26813.313066.1765%29000075400000.12394.1889%13.436967.5933%1.4168%
PrimeNet2610.068662.2951%190004000000.00723.0617%0.075863.4495%1.1544%
GPU722651.629564.6154%260005500000.00992.0892%1.639465.3546%0.7392%
Difference+3+11.6835+1.5611%+264000+6990000+0.1140+2.0997%+11.7975+2.2387%+2.2387%

Known prime factors (1 factor, 70.9 bits, 0.00158412% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
447719922402552173297961228792270.924250184905487761
19 × 13167626604619
2019-11-15191316762660461974.885129,741242,321

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2009-07-24T18:12:00Carsten Kossendeydurandal25000362500---0.008--1.208%
2012-10-24T10:56:00Squeeky_SquirrelT7500_22002900007540000---0.124--4.189%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2002-06-23T00:00:00ANONYMOUSv4_computers21261--0.069--
2010-10-04T21:16:00markroldgamer261262--0.069--
2012-02-29T05:45:00GrunwalderGIMPManual testing21263--0.356--
2016-02-23T16:38:52Mark RoseManual testing262263--0.219--
2014-09-19T17:31:00JayderHPJared263264--0.439--
2014-09-20T03:13:00monstManual testing264265--0.835--
2015-06-26T11:01:00snme2pm1Manual testing265266--1.669--
2018-06-24T21:07:55ramgeisManual testing266267--3.338--
2018-06-24T21:07:55ramgeisManual testing267268--6.676--


ECM factoring results:

Old Calculation Method

Total ECM effort:2.215 GHz-days
Estimated T-Level:0.600
DigitsB1CurvesCompleteFacMiss
201100012 / 1000.12088.638%
255000012 / 2800.04395.797%

New Calculation Method

Total ECM effort:2.215 GHz-days
Estimated T-Level:0.600
DigitsB1CompleteFacMiss
20110000.38767.903%
25500000.03596.562%
302500000.00299.785%


ECM Summary

B1B2factorcurvesGHz-days
50000500000091.661
50000500000030.554


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-04-05T00:00:00ANONYMOUSv4_computers21633647BC0DD2100.558
2000-03-27T00:00:00ANONYMOUSv4_computers35B33EF71ADDD4__0.558
2001-04-08T00:00:00ANONYMOUSv4_computers21633647BC0DD2100.558
2001-04-15T00:00:00ANONYMOUSv4_computers21633647BC0DD2100.558


PRP results:
dateuseridcompidcofactorsres64PRP
2019-11-16T08:10:27treborLaptop
2240255217329796122879
12D972B53733D8F4no
2019-11-18T09:17:42arnaudstm-11-010
2240255217329796122879
12D972B53733D8F4no


P-1 factor-bounds graph:
B1 = 290000, B2 = 7540000 (P-1 stage 2)
B1 = 290000 (P-1 stage 1)
B1 = 25000, B2 = 362500 (P-1 stage 2)
B1 = 25000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2019-11-18T09:17:42+00:00