is 2 3833009 - 1
has 1153851 decimal digits
takes 0.403 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LC3BD8220224415B1double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2677.752167.1642%2000001303648501.11056.8283%8.862669.4063%2.2421%
PrimeNet2600.040163.3333%170003400000.00533.1926%0.045364.5040%1.1706%
GPU722640.928665.6250%240005000000.00762.2266%0.936266.3904%0.7654%
Difference+3+6.8235+1.5392%+176000+129864850+1.1029+4.6018%+7.9264+3.0159%+3.0159%

Known prime factors (1 factor, 72.5 bits, 0.00189248% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
383300968604907928694482652072272.539894922343369067
3 × 13 × 19 × 179 × 6747052853
2016-03-241796747052853341.7055.982104.56

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2009-07-27T16:13:00Carsten Kossendeyleela20000270000---0.005--1.162%
2011-10-30T01:06:00Squeeky_SquirrelT7500_2200700001137500---0.020--2.369%
2014-10-17T00:38:00Jocelyn LaroucheManual testing8674586745---0.013--0.945%
2016-02-17T12:20:49Jocelyn LaroucheManual testing21954221954206---0.050--3.348%
2020-10-02T12:37:11Jocelyn LaroucheManual testing38330038330096---0.087--4.070%
2022-05-25T14:13:45Jocelyn LaroucheManual testing200000130364850---1.110--6.828%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-04-21T00:00:00ANONYMOUSv4_computers21260--0.040--
2009-02-26T15:59:00S485122USB-A260261--0.040--
2011-03-09T12:11:00markroldgamer261262--0.080--
2012-04-20T00:55:00GrunwalderGIMPManual testing21263--0.416--
2016-02-23T16:29:40Mark RoseManual testing262263--0.256--
2015-01-18T20:59:00VictordeHollanderManual testing263264--0.512--
2015-01-18T20:59:00VictordeHollanderManual testing264265--0.975--
2016-03-07T09:18:44ramgeisManual testing265266--1.950--


ECM factoring results:

Old Calculation Method

Total ECM effort:1.201 GHz-days
Estimated T-Level:0.400
DigitsB1CurvesCompleteFacMiss
20110008 / 1000.08092.274%
25500008 / 2800.02997.178%

New Calculation Method

Total ECM effort:1.201 GHz-days
Estimated T-Level:0.400
DigitsB1CompleteFacMiss
20110000.30873.514%
25500000.02897.193%
302500000.00299.821%


ECM Summary

B1B2factorcurvesGHz-days
50000500000060.901
50000500000020.300


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-07-11T00:00:00ANONYMOUSv4_computersC3BD8220224415B10.403
1999-09-14T00:00:00ANONYMOUSv4_computersC3BD8220224415B10.403


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-20T18:03:10kkmrkkblmbrbkManual testing
6860490792869448265207
AF61D76F54F6CF__no
2017-12-17T10:41:22Oliver KruseGTX-3
6860490792869448265207
AF61D76F54F6CF__no


P-1 factor-bounds graph:
B1 = 200000, B2 = 130364850 (P-1 stage 2)
B1 = 383300, B2 = 3833009 (P-1 stage 2)
B1 = 383300 (P-1 stage 1)
B1 = 219542, B2 = 2195420 (P-1 stage 2)
B1 = 219542 (P-1 stage 1)
B1 = 200000 (P-1 stage 1)
B1 = 70000, B2 = 1137500 (P-1 stage 2)
B1 = 86745 (P-1 stage 1)
B1 = 70000 (P-1 stage 1)
B1 = 20000, B2 = 270000 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
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1010
TF factor-bounds graph:
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265
264
263
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261
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2100
Last modified: 2022-05-25T14:13:45+00:00