is 2 1609567 - 1
has 484528 decimal digits
takes 0.072 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L461F1E5CEF1AC12Adouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26718.460868.6567%100000002000000001.31819.7559%19.778971.7145%3.0578%
PrimeNet2570.011963.1579%70001200000.00092.5511%0.012864.0978%0.9399%
GPU722610.190865.5738%6500600000.00061.0577%0.191565.9379%0.3641%
Difference+6+18.2700+3.0829%+9993500+199940000+1.3175+8.6981%+19.5875+5.7766%+5.7766%

Known prime factors (1 factor, 81.7 bits, 0.00507646% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
160956739525195453871346877077932581.7091227820757193436088
23 × 4312 × 1451 × 569407301
2017-01-09185761569407301577,4432.02063.7527

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-11-16T10:21:00BigBrotherWinston1000002000000---0.013--2.550%
2014-04-25T23:37:00ANONYMOUSManual testing150000150000---0.010--1.098%
2014-09-18T20:49:00Jocelyn LaroucheManual testing189877189877---0.012--1.243%
2015-02-15T11:05:00VictordeHollanderManual testing10000000200000000---1.318--9.756%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-07-27T00:00:00ANONYMOUSv4_computers21257--0.012--
2003-07-30T00:00:00ANONYMOUSv4_computers21258--0.024--
2016-02-23T16:28:41Mark RoseManual testing258260--0.072--
2010-05-04T13:20:00Architects Cubedm1_f2260261--0.095--
2016-02-23T16:28:41Mark RoseManual testing261262--0.191--
2010-07-12T02:44:00GrunwalderGIMPManual testing21263--0.992--
2016-02-23T16:28:41Mark RoseManual testing262263--0.610--
2015-01-30T19:14:00VictordeHollanderManual testing263264--1.220--
2015-01-30T19:14:00VictordeHollanderManual testing264265--2.321--
2015-10-11T16:52:28ramgeisManual testing265266--4.643--


ECM factoring results:

Old Calculation Method

Total ECM effort:15.652 GHz-days
Estimated T-Level:24.982
DigitsB1CurvesCompleteFacMiss
2011000279 / 1002.7906.056%
2550000279 / 2800.99636.854%

New Calculation Method

Total ECM effort:15.652 GHz-days
Estimated T-Level:24.982
DigitsB1CompleteFacMiss
20110009.0000.012%
25500000.81344.334%
302500000.05095.114%
3510000000.00299.771%


ECM Summary

B1B2factorcurvesGHz-days
50000500000027715.54
50000500000020.112


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2015-07-20T14:32:00MadPooManual testing461F1E5CEF1AC12A0.072


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-02T05:17:18Oliver KruseGTX-2
3952519545387134687707793
2F8DF7C432647B__no
2017-11-01T06:26:47kkmrkkblmbrbkc4.xlarge
3952519545387134687707793
2F8DF7C432647B__no


P-1 factor-bounds graph:
B1 = 10000000, B2 = 200000000 (P-1 stage 2)
B1 = 10000000 (P-1 stage 1)
B1 = 100000, B2 = 2000000 (P-1 stage 2)
B1 = 189877 (P-1 stage 1)
B1 = 150000 (P-1 stage 1)
B1 = 100000 (P-1 stage 1)
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107
104
105
106
107
108
109
TF factor-bounds graph:
267
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264
263
262
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257
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2100
Last modified: 2017-11-01T06:26:47+00:00