is 2 2422873 - 1
has 729358 decimal digits
takes 0.164 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L6DAE836A09936A52double-checked
PRPE71D54E5CABC550Cverified PRP

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26824.600967.6471%1986400695240000.55507.1718%25.155969.9673%2.3203%
PrimeNet2590.031762.7119%100001800000.00192.5230%0.033663.6526%0.9408%
GPU722630.658765.0794%100001400000.00171.2773%0.660465.5254%0.4461%
Difference+5+23.9422+2.5677%+1976400+69384000+0.5533+5.8944%+24.4955+4.4419%+4.4419%

Known prime factors (1 factor, 70.0 bits, 0.00288980% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
242287311938972427036232161272270.016246380483563031
246380483563031
2020-09-101246380483563031130.901,314,9052,455,877

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-10-08T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.233%
2010-11-14T15:37:00Oscar Östlin7501175011---0.007--0.686%
2011-01-24T00:08:00Oscar Östlin950001923750---0.019--2.363%
2014-04-16T15:16:00mikrMSI198640069524000---0.555--7.172%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-03-15T00:00:00ANONYMOUSv4_computers21259--0.032--
2016-02-23T16:29:14Mark RoseManual testing259260--0.032--
2009-01-14T04:42:00Sturle Sundeghibu.ifi260261--0.063--
2012-06-04T22:43:00Sebastian HornbostelManual testing261262--0.127--
2013-01-23T08:28:00dbaughManual testing262263--0.405--
2015-02-27T20:40:00VictordeHollanderManual testing263264--0.810--
2015-02-27T20:40:00VictordeHollanderManual testing264265--1.542--
2015-10-23T09:34:50ramgeisManual testing265266--3.084--
2017-07-05T06:34:29Gordon SpenceManual testing266267--6.168--
2019-04-29T13:20:23TJAOIManual testing267268--12.34--


ECM factoring results:

Old Calculation Method

Total ECM effort:7.220 GHz-days
Estimated T-Level:4.050
DigitsB1CurvesCompleteFacMiss
201100081 / 1000.81044.305%
255000081 / 2800.28974.841%

New Calculation Method

Total ECM effort:7.220 GHz-days
Estimated T-Level:4.050
DigitsB1CompleteFacMiss
20110002.6137.332%
25500000.23678.966%
302500000.01598.556%


ECM Summary

B1B2factorcurvesGHz-days
500005000000766.774
50000500000050.446


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-04-13T00:00:00ANONYMOUSv4_computers6DAE836A09936A520.164
2018-05-20T12:22:08kkmrkkblmbrbkold6DAE836A09936A520.164


PRP results:
dateuseridcompidcofactorsres64PRP
2020-09-10T09:18:33CrypticCluecruncher
1193897242703623216127
E71D54E5CABC550Cno


P-1 factor-bounds graph:
B1 = 1986400, B2 = 69524000 (P-1 stage 2)
B1 = 1986400 (P-1 stage 1)
B1 = 95000, B2 = 1923750 (P-1 stage 2)
B1 = 95000 (P-1 stage 1)
B1 = 75011 (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: 2020-09-10T09:18:33+00:00