is 2 5575861 - 1
has 1678502 decimal digits
takes 0.881 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LB756AFC7E1E0F706double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2675.329065.6716%5000050000000.07323.2228%5.402266.7780%1.1064%
PrimeNet2620.110262.9032%240005500000.01213.1685%0.122264.0786%1.1754%
GPU722662.648665.1515%340007000000.01612.1586%2.664765.9038%0.7522%
Difference+1+2.6804+0.5201%+16000+4300000+0.0571+1.0642%+2.7375+0.8742%+0.8742%

Known prime factors (1 factor, 69.1 bits, 0.00123869% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
55758616187236401947620399112169.06855482340771655
5 × 7 × 172 × 5485154797
2015-07-19289548515479725.47368.430127.81

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2009-06-06T07:33:00Carsten Kossendeyleela30000390000---0.011--1.560%
2010-11-13T20:47:00Squeeky_SquirrelP4_2600650001023750---0.027--2.412%
unknown500005000000---0.073--3.223%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2009-02-10T04:51:00GrunwalderGIMPManual testing262263--0.176--
2014-12-20T11:22:00NesowaManual testing263264--0.352--
2014-12-21T01:50:00monstManual testing264265--0.670--


ECM factoring results:

Old Calculation Method

Total ECM effort:0.720 GHz-days
Estimated T-Level:0.150
DigitsB1CurvesCompleteFacMiss
20110003 / 1000.03097.030%
25500003 / 2800.01198.932%

New Calculation Method

Total ECM effort:0.720 GHz-days
Estimated T-Level:0.150
DigitsB1CompleteFacMiss
20110000.11589.102%
25500000.01198.938%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
50000500000030.720


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2000-10-07T00:00:00ANONYMOUSv4_computersB756AFC7E1E0F7060.881


PRP results:
dateuseridcompidcofactorsres64PRP
2017-12-09T01:51:22Oliver KruseGTX-2
618723640194762039911
E73C566D20D264__no
2018-04-03T19:01:55kkmrkkblmbrbkc5.xlarge
618723640194762039911
E73C566D20D264__no


P-1 factor-bounds graph:
B1 = 50000, B2 = 5000000 (P-1 stage 2)
B1 = 65000, B2 = 1023750 (P-1 stage 2)
B1 = 65000 (P-1 stage 1)
B1 = 50000 (P-1 stage 1)
B1 = 30000, B2 = 390000 (P-1 stage 2)
B1 = 30000 (P-1 stage 1)
101
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105
101
102
103
104
105
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109
1010
TF factor-bounds graph:
267
265
264
263
250
260
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2100
Last modified: 2018-04-03T19:01:55+00:00