is 2 2345657 - 1
has 706114 decimal digits
takes 0.158 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L2EA71507A9715669double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual270101.869468.5714%500000150000000.12643.8942%101.995769.7953%1.2239%
PrimeNet2580.016462.0690%110002000000.00213.0476%0.018563.2250%1.1560%
GPU722620.261964.5161%130002200000.00241.8349%0.264365.1672%0.6511%
Difference+8+101.6075+4.0553%+487000+14780000+0.1240+2.0593%+101.7315+4.6281%+4.6281%

Known prime factors (1 factor, 75.9 bits, 0.00323677% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
2345657716549844008892011427832375.92315273968956435063
7 × 17 × 4243 × 30250454939
2015-07-264243302504549394,097.5161.44301.53

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-09-21T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.149%
2010-03-02T08:50:00Budannan50000010000000---0.100--3.588%
2018-03-18T01:20:05alpertronManual testing5000001500000012---0.126--3.894%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2009-01-15T04:44:00Sturle Sundebuxtehude.ifi260261--0.065--
2012-05-29T09:42:00Sebastian HornbostelManual testing261262--0.131--
2013-10-20T09:47:00SergiosiManual testing262263--0.418--
2013-10-20T09:47:00SergiosiManual testing263264--0.837--
2013-11-12T13:19:00David CampeauManual testing264265--1.593--
2014-03-08T13:51:00Never Odd Or EvenManual testing265266--3.186--
2014-03-08T13:51:00Never Odd Or EvenManual testing266267--6.372--
2014-03-08T13:51:00Never Odd Or EvenManual testing267268--12.74--
2014-03-08T13:51:00Never Odd Or EvenManual testing268269--25.49--
2014-03-08T13:51:00Never Odd Or EvenManual testing269270--50.97--


ECM factoring results:

Old Calculation Method

Total ECM effort:1.331 GHz-days
Estimated T-Level:0.750
DigitsB1CurvesCompleteFacMiss
201100015 / 1000.15086.006%
255000015 / 2800.05494.775%

New Calculation Method

Total ECM effort:1.331 GHz-days
Estimated T-Level:0.750
DigitsB1CompleteFacMiss
20110000.48461.639%
25500000.04495.721%
302500000.00399.731%


ECM Summary

B1B2factorcurvesGHz-days
500005000000131.153
50000500000020.177


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-03-01T00:00:00Martijn Ottov4_computers2EA71507A97156690.158
2009-11-28T14:48:00AntikristianosMain_System2EA71507A97156690.158


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-12T04:57:59Oliver KruseGTX-3
71654984400889201142783
F063148C37132C__no
2017-11-24T06:02:27storm5510HP-Z220-CMT
71654984400889201142783
F063148C37132C__no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000, B2 = 10000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 2048 (P-1 stage 1)
102
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105
106
102
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104
105
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109
1010
1011
TF factor-bounds graph:
270
269
268
267
266
265
264
263
262
261
250
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270
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2100
Last modified: 2018-03-18T01:20:05+00:00