is 2 2134439 - 1
has 642531 decimal digits
takes 0.140 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L2130B9FE719147B4double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26827.925367.6471%25000001250000000.87467.9112%28.800070.2066%2.5595%
PrimeNet2580.018062.0690%90001700000.00172.7300%0.019763.1045%1.0355%
GPU722620.287864.5161%100001500000.00171.4868%0.289565.0437%0.5276%
Difference+6+27.6375+3.1309%+2490000+124850000+0.8730+6.4244%+28.5104+5.1629%+5.1629%

Known prime factors (1 factor, 80.8 bits, 0.00378616% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
213443921242548879552251997931532580.813497614335184848384
29 × 33 × 35996407348441
2020-07-0951235996407348441228,550186,974349,216

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-03-07T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.224%
2010-10-25T21:46:00Oscar Östlin7501175011---0.007--0.669%
2010-11-25T09:51:00Oscar Östlin800001500000---0.015--2.102%
2013-11-13T18:49:00c10ck3rManual testing50000010000000---0.097--4.329%
2017-10-04T02:58:04mikrMSI250000012500000012---0.875--7.911%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-01-29T00:00:00ANONYMOUSv4_computers21258--0.018--
2016-02-23T16:29:06Mark RoseManual testing258260--0.054--
2009-01-04T11:58:00Sturle Sundedittersdorf.ifi260261--0.072--
2012-04-15T15:47:00Sebastian HornbostelManual testing261262--0.144--
2013-02-21T00:57:00dbaughManual testing262263--0.460--
2015-03-18T10:55:00VictordeHollanderManual testing263264--0.920--
2015-03-18T10:55:00VictordeHollanderManual testing264265--1.751--
2015-12-27T16:49:13ramgeisManual testing265266--3.501--
2016-10-29T15:24:09Gordon SpenceManual testing266267--7.002--
2019-04-22T13:11:43TJAOIManual testing267268--14.00--


ECM factoring results:

Old Calculation Method

Total ECM effort:8.347 GHz-days
Estimated T-Level:4.900
DigitsB1CurvesCompleteFacMiss
201100098 / 1000.98037.346%
255000095 / 2800.33971.185%

New Calculation Method

Total ECM effort:8.347 GHz-days
Estimated T-Level:4.900
DigitsB1CompleteFacMiss
20110003.0654.665%
25500000.27775.808%
302500000.01798.309%


ECM Summary

B1B2factorcurvesGHz-days
40000600000030.247
500005000000927.845
50000500000030.256


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-02-21T00:00:00ANONYMOUSv4_computers2130B9FE719147B40.140
2018-04-06T06:43:07kkmrkkblmbrbkold2130B9FE719147B40.140


PRP results:
dateuseridcompidcofactorsres64PRP
2020-07-09T06:50:35CrypticCluecruncher
2124254887955225199793153
C0DBC58A80E6445Eno
2020-07-11T06:51:33oodairacom1
2124254887955225199793153
C0DBC58A80E6445Eno


P-1 factor-bounds graph:
B1 = 2500000, B2 = 125000000 (P-1 stage 2)
B1 = 2500000 (P-1 stage 1)
B1 = 500000, B2 = 10000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 80000, B2 = 1500000 (P-1 stage 2)
B1 = 80000 (P-1 stage 1)
B1 = 75011 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 2048 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2020-07-11T06:51:33+00:00