is 2 2433763 - 1
has 732636 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-L2D7942021A57B0DBdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26824.490867.6471%1986400695240000.55507.1751%25.045869.9684%2.3214%
PrimeNet2590.031662.7119%100001800000.00192.5251%0.033463.6534%0.9416%
GPU722630.655865.0794%100001500000.00171.3058%0.657565.5354%0.4560%
Difference+5+23.8350+2.5677%+1976400+69374000+0.5533+5.8693%+24.3883+4.4331%+4.4331%

Known prime factors (1 factor, 77.2 bits, 0.00317043% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
24337631689310815706620039297532477.16134705737898608452
22 × 13 × 587 × 1136998358623
2020-11-19587113699835862316,0946,068.011,333

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--0.770%
2010-11-17T11:34:00Jocelyn LaroucheManual testing2000020000---0.002--0.262%
2011-01-09T13:47:00Oscar Östlin7501175011---0.007--0.686%
2011-01-24T11:30:00Oscar Östlin950001923750---0.019--2.364%
2014-05-01T18:05:00mikrMSI198640069524000---0.555--7.175%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-02-08T00:00:00ANONYMOUSv4_computers21258--0.016--
1999-03-15T00:00:00ANONYMOUSv4_computers21259--0.032--
2016-02-23T16:29:14Mark RoseManual testing259260--0.032--
2009-01-17T17:47:00Sturle Sundedanzi.ifi260261--0.063--
2012-06-05T17:42:00Sebastian HornbostelManual testing261262--0.126--
2013-12-04T21:13:00Jerry HallettManual testing262263--0.403--
2015-02-27T20:40:00VictordeHollanderManual testing263264--0.807--
2015-02-27T20:40:00VictordeHollanderManual testing264265--1.535--
2015-10-25T20:34:59ramgeisManual testing265266--3.070--
2017-07-08T12:01:25Gordon SpenceManual testing266267--6.141--
2019-06-24T09:35:58TJAOIManual testing267268--12.28--


ECM factoring results:

Old Calculation Method

Total ECM effort:8.741 GHz-days
Estimated T-Level:4.900
DigitsB1CurvesCompleteFacMiss
201100098 / 1000.98037.346%
255000098 / 2800.35070.425%

New Calculation Method

Total ECM effort:8.741 GHz-days
Estimated T-Level:4.900
DigitsB1CompleteFacMiss
20110003.1614.237%
25500000.28675.148%
302500000.01898.256%


ECM Summary

B1B2factorcurvesGHz-days
500005000000938.295
50000500000050.446


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-03-03T00:00:00ANONYMOUSv4_computers2D7942021A57B0DB0.164
2000-01-19T00:00:00kraDenv4_computers2D7942021A57B0DB0.164
2018-05-22T17:10:11kkmrkkblmbrbkold2D7942021A57B0DB0.164


PRP results:
dateuseridcompidcofactorsres64PRP
2020-11-19T20:45:45mrhlanai
168931081570662003929753
2E28F5E76A889AF3no
2020-11-19T21:02:44ATHec2-PRPCFDC
168931081570662003929753
2E28F5E76A889AF3no


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 = 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: 2020-11-19T21:02:44+00:00