is 2 1653287 - 1
has 497689 decimal digits
takes 0.078 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L7E1185BBD8DD4CAAdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26717.972668.6567%80000004000000002.003410.6535%19.976071.9959%3.3392%
PrimeNet2570.011663.1579%70001200000.00092.5644%0.012564.1027%0.9448%
GPU722610.185865.5738%7000700000.00071.1516%0.186565.9702%0.3964%
Difference+6+17.7868+3.0829%+7993000+399930000+2.0026+9.5019%+19.7895+6.0256%+6.0256%

Known prime factors (1 factor, 95.4 bits, 0.00577005% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1653287521058588672409082471121787692995.39515758261834527492276632
23 × 3 × 79 × 1579 × 1811 × 15493 × 187600451
2018-08-12154931876004519.404e+90.69851.3027

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2012-02-29T17:08:00AxonManual testing100000100000---0.007--0.878%
2012-02-29T17:12:00AxonManual testing200000200000---0.014--1.282%
2012-02-29T18:09:00AxonManual testing300000300000---0.020--1.563%
2012-02-29T18:12:00AxonManual testing400000400000---0.027--1.783%
2012-02-29T19:09:00AxonManual testing500000500000---0.034--1.965%
2012-02-29T19:12:00AxonManual testing600000600000---0.041--2.121%
2012-02-29T20:08:00AxonManual testing700000700000---0.048--2.259%
2012-02-29T20:11:00AxonManual testing800000800000---0.055--2.382%
2012-02-29T21:09:00AxonManual testing900000900000---0.061--2.493%
2012-02-29T21:13:00AxonManual testing10000001000000---0.068--2.595%
2012-03-01T06:08:00AxonManual testing10000008000000---0.094--4.724%
2012-03-01T07:09:00AxonManual testing100000020000000---0.139--5.689%
2017-12-24T12:25:08Jocelyn Larouchelow 4M20000002000000012---0.203--6.015%
2018-02-08T12:52:28Jocelyn Larouchelow 4M16532872000000012---0.181--5.935%
2018-02-08T17:39:28Jocelyn Larouchelow 4M16532874000000012---0.255--6.738%
2018-02-18T02:59:34Jocelyn Larouchelow 4M16532878000000012---0.404--7.549%
2018-03-30T19:42:34Jocelyn Larouchelow 4M165328716532870012---0.721--8.404%
2018-08-12T10:05:53mikrS0538000000400000000122995.3952.0030.1564.00710.653%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1997-12-04T00:00:00ANONYMOUSv4_computers21256--0.006--
1997-12-21T00:00:00ANONYMOUSv4_computers21256--0.006--
1998-02-01T00:00:00ANONYMOUSv4_computers21256--0.006--
1999-07-27T00:00:00ANONYMOUSv4_computers21257--0.012--
2003-05-11T00:00:00ANONYMOUSv4_computers21258--0.023--
2016-02-23T16:28:44Mark RoseManual testing258260--0.070--
2010-04-29T03:30:00Architects Cubedm1_tt260261--0.093--
2016-02-23T16:28:44Mark RoseManual testing261262--0.186--
2010-08-13T02:23:00GrunwalderGIMPManual testing21263--0.965--
2016-02-23T16:28:44Mark RoseManual testing262263--0.594--
2015-05-08T01:31:00omylistManual testing263264--1.188--
2015-05-08T17:30:00monstManual testing264265--2.260--
2015-10-11T16:52:50ramgeisManual testing265266--4.520--
2017-10-20T14:50:27TJAOIManual testing266267--9.040--


ECM factoring results:

Old Calculation Method

Total ECM effort:16.595 GHz-days
Estimated T-Level:25.000
DigitsB1CurvesCompleteFacMiss
2011000280 / 1002.8005.996%
2550000280 / 2801.00036.722%

New Calculation Method

Total ECM effort:16.595 GHz-days
Estimated T-Level:25.000
DigitsB1CompleteFacMiss
20110009.0320.012%
25500000.81644.205%
302500000.05095.097%
3510000000.00299.770%


ECM Summary

B1B2factorcurvesGHz-days
50000500000028016.60


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1997-12-04T00:00:00ANONYMOUSv4_computers7E1185BBD8DD4CAA0.078
1997-12-21T00:00:00ANONYMOUSv4_computers7E1185BBD8DD4CAA0.078
1998-02-01T00:00:00ANONYMOUSv4_computers7E1185BBD8DD4CAA0.078
2015-11-13T16:44:28MadPooManual testing7E1185BBD8DD4CAA0.078


PRP results:
dateuseridcompidcofactorsres64PRP
2018-08-12T10:41:03ATHec2-PRPCF
52105858867240908247112178769
9E78360A467E97__no
2018-08-14T10:14:51RuzovejOndra_Ntb
52105858867240908247112178769
9E78360A467E97__no


P-1 factor-bounds graph:
B1 = 8000000, B2 = 400000000 (P-1 stage 2)
B1 = 1653287, B2 = 165328700 (P-1 stage 2)
B1 = 8000000 (P-1 stage 1)
B1 = 1653287, B2 = 80000000 (P-1 stage 2)
B1 = 1653287, B2 = 40000000 (P-1 stage 2)
B1 = 2000000, B2 = 20000000 (P-1 stage 2)
B1 = 1653287, B2 = 20000000 (P-1 stage 2)
B1 = 1000000, B2 = 20000000 (P-1 stage 2)
B1 = 2000000 (P-1 stage 1)
B1 = 1653287 (P-1 stage 1)
B1 = 1000000, B2 = 8000000 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
B1 = 900000 (P-1 stage 1)
B1 = 800000 (P-1 stage 1)
B1 = 700000 (P-1 stage 1)
B1 = 600000 (P-1 stage 1)
B1 = 500000 (P-1 stage 1)
B1 = 400000 (P-1 stage 1)
B1 = 300000 (P-1 stage 1)
B1 = 200000 (P-1 stage 1)
B1 = 100000 (P-1 stage 1)
103
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105
106
107
103
104
105
106
107
108
109
TF factor-bounds graph:
267
266
265
264
263
262
261
260
258
257
256
250
260
270
280
290
2100
Last modified: 2018-08-14T10:14:51+00:00