is 2 2494169 - 1
has 750820 decimal digits
takes 0.173 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LA5DDDB7F2CA40D75double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26823.897767.6471%30000001000000000.83327.8768%24.730970.1954%2.5484%
PrimeNet2590.030862.7119%100001800000.00192.5368%0.032763.6578%0.9459%
GPU722630.639965.0794%110001600000.00191.3814%0.641865.5618%0.4824%
Difference+5+23.2578+2.5677%+2989000+99840000+0.8313+6.4954%+24.0891+4.6337%+4.6337%

Known prime factors (1 factor, 70.0 bits, 0.00280665% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
249416911827556790578877136732270.003237104157548644
22 × 59276039387161
2020-07-20459276039387161158.14324,805606,645

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-10-23T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.235%
2003-10-31T00:00:00Team Prime Ribv4_computers15000228750---0.003--0.786%
2010-12-22T11:37:00Jocelyn LaroucheManual testing2000020000---0.002--0.263%
2011-01-24T20:06:00Oscar Östlin950001971250---0.020--2.387%
2014-09-10T00:51:00Jocelyn LaroucheManual testing120734120734---0.012--0.917%
2014-12-04T16:25:00mikrMSI238250085770100---0.697--7.552%
2015-12-26T13:12:56mikrMSI300000010000000012---0.833--7.877%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-05-02T00:00:00Ethan O'Connorv4_computers21259--0.031--
2016-02-23T16:29:15Mark RoseManual testing259260--0.031--
2009-01-10T21:56:00Sturle Sundeginglo.ifi260261--0.062--
2012-06-11T11:06:00Sebastian HornbostelManual testing261262--0.123--
2013-01-14T11:53:00dbaughManual testing262263--0.394--
2015-03-03T21:37:00VictordeHollanderManual testing263264--0.787--
2015-03-03T21:37:00VictordeHollanderManual testing264265--1.498--
2015-10-31T16:44:06ramgeisManual testing265266--2.996--
2017-07-24T22:21:29Gordon SpenceManual testing266267--5.992--
2019-04-08T13:40:34TJAOIManual testing267268--11.98--


ECM factoring results:

Old Calculation Method

Total ECM effort:5.055 GHz-days
Estimated T-Level:2.750
DigitsB1CurvesCompleteFacMiss
201100055 / 1000.55057.535%
255000055 / 2800.19682.137%

New Calculation Method

Total ECM effort:5.055 GHz-days
Estimated T-Level:2.750
DigitsB1CompleteFacMiss
20110001.77416.962%
25500000.16085.185%
302500000.01099.017%


ECM Summary

B1B2factorcurvesGHz-days
500005000000544.963
50000500000010.092


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-05-02T00:00:00Ethan O'Connorv4_computersA5DDDB7F2CA40D750.173
2018-06-01T09:04:15kkmrkkblmbrbkoldA5DDDB7F2CA40D750.173


PRP results:
dateuseridcompidcofactorsres64PRP
2020-07-21T01:40:28CrypticClueManual testing
1182755679057887713673
E2C13DC9E599EAC1no
2020-07-22T01:11:54marssystemssystem11
1182755679057887713673
E2C13DC9E599EAC1no


P-1 factor-bounds graph:
B1 = 3000000, B2 = 100000000 (P-1 stage 2)
B1 = 2382500, B2 = 85770100 (P-1 stage 2)
B1 = 3000000 (P-1 stage 1)
B1 = 2382500 (P-1 stage 1)
B1 = 95000, B2 = 1971250 (P-1 stage 2)
B1 = 120734 (P-1 stage 1)
B1 = 95000 (P-1 stage 1)
B1 = 15000, B2 = 228750 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
B1 = 15000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 2048 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2020-07-22T01:11:54+00:00