is 2 2445829 - 1
has 736268 decimal digits
takes 0.165 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L9C5892F5FD72D755double-checked
PRP8DB791E496E01E7Bverified PRP

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26824.370067.6471%60000001800000001.51649.0092%25.886470.5618%2.9147%
PrimeNet2590.031462.7119%100001800000.00192.5275%0.033363.6543%0.9424%
GPU722630.652565.0794%100001500000.00171.3072%0.654365.5358%0.4565%
Difference+5+23.7175+2.5677%+5990000+179850000+1.5146+7.7020%+25.2321+5.0260%+5.0260%

Known prime factors (1 factor, 72.6 bits, 0.00296689% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
244582969868144070804542601032272.5651428312119751719
277 × 5156361443147
2021-01-052775156361443147675.3427,51951,398

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-10-14T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.233%
2003-10-31T00:00:00Team Prime Ribv4_computers15000217500---0.003--0.771%
2010-11-19T00:04:00Jocelyn LaroucheManual testing2000020000---0.002--0.262%
2011-01-18T19:31:00Oscar Östlin950001947500---0.019--2.373%
2014-01-24T07:57:00mikrMSI117200048000000---0.365--6.434%
2019-04-01T02:11:49Sid & AndyBullseye600000018000000012---1.516--9.009%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-03-15T00:00:00ANONYMOUSv4_computers21259--0.031--
2016-02-23T16:29:14Mark RoseManual testing259260--0.031--
2009-01-14T05:53:00Sturle Sundeletov.ifi260261--0.063--
2011-10-04T04:18:00Sebastian HornbostelManual testing261262--0.126--
2013-12-04T21:13:00Jerry HallettManual testing262263--0.401--
2015-02-27T20:41:00VictordeHollanderManual testing263264--0.803--
2015-02-27T20:41:00VictordeHollanderManual testing264265--1.528--
2015-10-25T20:35:03ramgeisManual testing265266--3.055--
2017-07-12T11:35:14Gordon SpenceManual testing266267--6.111--
2019-03-25T14:11:01TJAOIManual testing267268--12.22--


ECM factoring results:

Old Calculation Method

Total ECM effort:9.461 GHz-days
Estimated T-Level:21.893
DigitsB1CurvesCompleteFacMiss
2011000106 / 1001.06034.461%
2550000106 / 2800.37968.438%

New Calculation Method

Total ECM effort:9.461 GHz-days
Estimated T-Level:21.893
DigitsB1CompleteFacMiss
20110004.0771.696%
25500000.37768.576%
302500000.02497.649%
3510000000.00199.889%


ECM Summary

B1B2factorcurvesGHz-days
5000050000001008.926
50000500000060.536


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-09-07T00:00:00ANONYMOUSv4_computers9C5892F5FD72D7550.165
2018-05-25T03:23:02kkmrkkblmbrbkold9C5892F5FD72D7550.165


PRP results:
dateuseridcompidcofactorsres64PRP
2021-01-05T22:01:48riccardo ubertiColab_noGPU12
6986814407080454260103
8DB791E496E01E7Bno


P-1 factor-bounds graph:
B1 = 6000000, B2 = 180000000 (P-1 stage 2)
B1 = 6000000 (P-1 stage 1)
B1 = 1172000, B2 = 48000000 (P-1 stage 2)
B1 = 1172000 (P-1 stage 1)
B1 = 95000, B2 = 1947500 (P-1 stage 2)
B1 = 95000 (P-1 stage 1)
B1 = 15000, B2 = 217500 (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: 2021-01-05T22:01:48+00:00