is 2 2400883 - 1
has 722738 decimal digits
takes 0.162 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LCCF6B62094542F0Ddouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27099.526168.5714%3102822434395080.51925.7697%100.045470.3848%1.8133%
PrimeNet2590.032062.7119%100001700000.00182.4798%0.033863.6365%0.9247%
GPU722630.664865.0794%100001400000.00171.2749%0.666465.5246%0.4452%
Difference+7+98.8614+3.4921%+3092822+43299508+0.5175+4.4948%+99.3789+4.8602%+4.8602%

Known prime factors (1 factor, 78.6 bits, 0.00327261% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
24008834491121682159248635738232478.57193530623569729317
31 × 673 × 4483086016859
2020-05-21673448308601685941,48623,92644,687

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-09-29T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.150%
2010-11-08T22:12:00Jocelyn LaroucheManual testing1500015000---0.001--0.140%
2010-11-16T23:08:00Jocelyn LaroucheManual testing2000020000---0.002--0.183%
2010-12-23T00:59:00markrtiny900001845000---0.018--1.807%
2014-02-13T08:03:00mikrMSI310282243439508---0.519--5.770%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2004-04-29T00:00:00ANONYMOUSv4_computers21258--0.016--
1999-03-15T00:00:00ANONYMOUSv4_computers21259--0.032--
2016-02-23T16:29:13Mark RoseManual testing259260--0.032--
2009-01-16T04:19:00Sturle Sundeghibu.ifi260261--0.064--
2012-06-02T19:42:00Sebastian HornbostelManual testing261262--0.128--
2013-12-04T21:14:00Jerry HallettManual testing262263--0.409--
2015-02-23T17:25:00VictordeHollanderManual testing263264--0.818--
2015-02-23T17:25:00VictordeHollanderManual testing264265--1.556--
2015-10-21T10:28:03ramgeisManual testing265266--3.112--
2017-06-29T16:14:23Gordon SpenceManual testing266267--6.225--
2019-01-15T09:29:34Anton RepkoManual testing267269--37.35--
2019-01-30T05:43:22YxinityManual testing269270--49.80--


ECM factoring results:

Old Calculation Method

Total ECM effort:4.095 GHz-days
Estimated T-Level:2.300
DigitsB1CurvesCompleteFacMiss
201100046 / 1000.46062.982%
255000046 / 2800.16484.825%

New Calculation Method

Total ECM effort:4.095 GHz-days
Estimated T-Level:2.300
DigitsB1CompleteFacMiss
20110001.48422.676%
25500000.13487.449%
302500000.00899.178%


ECM Summary

B1B2factorcurvesGHz-days
500005000000454.006
50000500000010.089


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2015-11-14T22:45:00MadPooManual testingCCF6B62094542F0D0.162


PRP results:
dateuseridcompidcofactorsres64PRP
2020-05-22T05:20:59CrypticCluecruncher
449112168215924863573823
DC2F5365FB82591Cno
2020-05-23T23:00:58Team_InspectorPurple
449112168215924863573823
DC2F5365FB82591Cno


P-1 factor-bounds graph:
B1 = 3102822, B2 = 43439508 (P-1 stage 2)
B1 = 3102822 (P-1 stage 1)
B1 = 90000, B2 = 1845000 (P-1 stage 2)
B1 = 90000 (P-1 stage 1)
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: 2020-05-23T23:00:58+00:00