is 2 2412073 - 1
has 726107 decimal digits
takes 0.163 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LE19B4700A7394B90double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27099.064468.5714%3102822434395080.51925.7726%99.583670.3857%1.8142%
PrimeNet2590.031862.7119%100001800000.00192.5209%0.033763.6518%0.9400%
GPU722630.661765.0794%100001400000.00171.2762%0.663465.5250%0.4456%
Difference+7+98.4027+3.4921%+3092822+43299508+0.5175+4.4964%+98.9203+4.8607%+4.8607%

Known prime factors (1 factor, 71.5 bits, 0.00296433% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
241207333433981280009851216092271.502693054921638148
22 × 3 × 149837 × 385449367		2020-05-11149837385449367290.392.07103.8421

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-10-08T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.150%
2010-11-09T10:51:00Jocelyn LaroucheManual testing1500015000---0.001--0.140%
2010-11-16T23:09:00Jocelyn LaroucheManual testing2000020000---0.002--0.183%
2010-12-20T19:24:00markrtiny950001923750---0.019--1.850%
2014-03-13T20:07:00mikrMSI310282243439508---0.519--5.773%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-03-15T00:00:00ANONYMOUSv4_computers21259--0.032--
2016-02-23T16:29:13Mark RoseManual testing259260--0.032--
2009-01-15T00:28:00Sturle Sundetristan.ifi260261--0.064--
2012-06-03T22:43:00Sebastian HornbostelManual testing261262--0.127--
2013-12-04T21:14:00Jerry HallettManual testing262263--0.407--
2015-02-27T20:40:00VictordeHollanderManual testing263264--0.814--
2015-02-27T20:40:00VictordeHollanderManual testing264265--1.549--
2015-10-22T10:17:17ramgeisManual testing265266--3.098--
2017-07-02T13:16:04Gordon SpenceManual testing266267--6.196--
2019-02-25T10:48:00Anton RepkoManual testing267269--37.18--
2019-04-09T12:36:29YxinityManual testing269270--49.57--


ECM factoring results:

Old Calculation Method

Total ECM effort:3.919 GHz-days
Estimated T-Level:2.200
DigitsB1CurvesCompleteFacMiss
201100044 / 1000.44064.261%
255000044 / 2800.15785.434%

New Calculation Method

Total ECM effort:3.919 GHz-days
Estimated T-Level:2.200
DigitsB1CompleteFacMiss
20110001.41924.187%
25500000.12887.961%
302500000.00899.213%


ECM Summary

B1B2factorcurvesGHz-days
500005000000423.741
50000500000020.178


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-05-30T00:00:00ANONYMOUSv4_computersE19B4700A7394B900.163


PRP results:
dateuseridcompidcofactorsres64PRP
2020-05-11T17:30:02CrypticCluecruncher
3343398128000985121609
1405829C4D90D561no
2020-05-14T00:14:48arnaudstm-11-010
3343398128000985121609
1405829C4D90D561no


P-1 factor-bounds graph:
B1 = 3102822, B2 = 43439508 (P-1 stage 2)
B1 = 3102822 (P-1 stage 1)
B1 = 95000, B2 = 1923750 (P-1 stage 2)
B1 = 95000 (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: 2020-05-14T00:14:48+00:00