is 2 1650703 - 1
has 496912 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-LA423166D12CC73E6double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26718.000868.6567%2000000200000000.20346.0141%18.204270.5417%1.8850%
PrimeNet2570.011663.1579%70001200000.00092.5637%0.012564.1024%0.9445%
GPU722610.186165.5738%6500800000.00071.1722%0.186865.9773%0.4035%
Difference+6+17.8147+3.0829%+1993500+19920000+0.2027+4.8419%+18.0174+4.5644%+4.5644%

Known prime factors (2 factors, 151.4 bits, 0.00917023% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
165070380888139930343372803132272.7762450111859321252
22 × 3 × 7 × 29167998325253
2017-12-17729167998325253768.99108,445202,545
16507034570890910337462646057112478.597138452856459867785
5 × 11 × 109 × 223 × 353 × 293381797
2019-11-2535329338179741,9421.09082.0373

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
1650703369730863561711281660099588494430596902766754346151.373
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%
2012-02-29T18:08:00AxonManual testing300000300000---0.020--1.563%
2012-02-29T18:11:00AxonManual testing400000400000---0.027--1.782%
2012-02-29T19:09:00AxonManual testing500000500000---0.034--1.964%
2012-02-29T19:12:00AxonManual testing600000600000---0.041--2.121%
2012-02-29T20:08:00AxonManual testing700000700000---0.048--2.258%
2012-02-29T20:11:00AxonManual testing800000800000---0.055--2.381%
2012-02-29T21:09:00AxonManual testing900000900000---0.061--2.492%
2012-02-29T21:13:00AxonManual testing10000001000000---0.068--2.595%
2012-03-01T06:08:00AxonManual testing10000008000000---0.094--4.723%
2012-03-01T07:09:00AxonManual testing100000020000000---0.139--5.688%
2017-12-24T00:14:18Jocelyn Larouchelow 4M20000002000000012---0.203--6.014%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2003-05-19T00:00:00ANONYMOUSv4_computers21258--0.023--
2016-02-23T16:28:44Mark RoseManual testing258260--0.070--
2010-04-27T06:40:00Architects Cubedm1_tt260261--0.093--
2016-02-23T16:28:44Mark RoseManual testing261262--0.186--
2010-09-26T01:51:00GrunwalderGIMPManual testing21263--0.967--
2016-02-23T16:28:44Mark RoseManual testing262263--0.595--
2015-05-07T00:03:00omylistManual testing263264--1.189--
2015-05-07T16:26:00monstManual testing264265--2.264--
2015-10-11T16:52:49ramgeisManual testing265266--4.527--
2017-10-20T14:50:28TJAOIManual testing266267--9.054--


ECM factoring results:

Old Calculation Method

Total ECM effort:14.874 GHz-days
Estimated T-Level:24.482
DigitsB1CurvesCompleteFacMiss
2011000251 / 1002.5108.025%
2550000251 / 2800.89640.737%

New Calculation Method

Total ECM effort:14.874 GHz-days
Estimated T-Level:24.482
DigitsB1CompleteFacMiss
20110008.0970.030%
25500000.73248.105%
302500000.04595.594%
3510000000.00299.794%


ECM Summary

B1B2factorcurvesGHz-days
50000500000021112.50
50000500000010.059
500005000000392.311


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-04-13T00:00:00Greg Hewgillv4_computersA423166D12CC73E60.078
2015-07-19T18:02:00MadPooManual testingA423166D12CC73E60.078


PRP results:
dateuseridcompidcofactorsres64PRP
2017-12-22T02:35:10BloodERazorManual testing
8088813993034337280313
C30A9524CDD17F__no
2017-12-26T01:47:51Oliver KruseGTX-3
8088813993034337280313
C30A9524CDD17F__no
2019-11-25T16:02:22mnd975204b
8088813993034337280313
457089091033746264605711
C30A9524CDD17F79no


P-1 factor-bounds graph:
B1 = 2000000, B2 = 20000000 (P-1 stage 2)
B1 = 1000000, B2 = 20000000 (P-1 stage 2)
B1 = 2000000 (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)
100
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103
104
105
106
107
100
101
102
103
104
105
106
107
108
109
1010
1011
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1013
1014
TF factor-bounds graph:
267
266
265
264
263
262
261
260
258
250
260
270
280
290
2100
Last modified: 2019-11-25T16:02:22+00:00