is 2 4006333 - 1
has 1206027 decimal digits
takes 0.500 GHz-days to do one PRP test
Last-known PrimeNet details:
0 L-L tests remaining
ResidueStatus
L-LF22B593468E5BF94double-checked
PRPF21DBA9540057449

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27059.643268.5714%46000001250000002.01827.5047%61.661470.9301%6.9956%
PrimeNet2610.076763.9344%160003200000.00592.7287%0.082664.9186%0.9841%
GPU722651.821066.1538%200003600000.00701.7039%1.828066.7306%0.5767%
Difference+5+57.8222+2.4176%+4580000+124640000+2.0112+5.8008%+59.8334+4.1995%+4.1995%

Known prime factors (1 factor, 89.2 bits, 0.00222698% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
40063337209872308841855348702384392789.22089980941534838159343
53 × 273787 × 6201001559113
2021-05-25273787620100155911337,545,30361,099114,116

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-12-13T00:00:00Team Prime Ribv4_computers20000300000---0.006--0.769%
2010-01-02T05:48:00Squeeky_SquirrelP4_260040000600000---0.013--1.184%
2013-02-08T15:54:00Squeeky_SquirrelP4_2600650001056250---0.022--1.575%
2013-07-30T03:36:00Squeeky_SquirrelP4_26001200002280000---0.043--2.195%
2015-01-01T14:29:00Nesowanewfs2250004556250---0.083--2.890%
2017-10-22T11:20:50mikrS061460000012500000012---2.018--7.505%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2021-05-25T01:14:07ATHec2-P_12500000250000027P+12789.2200.606


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-07-29T00:00:00ANONYMOUSv4_computers?261--0.038--
2009-11-06T16:57:00GrunwalderGIMPManual testing21263--0.398--
2016-02-23T16:29:45Mark RoseManual testing261263--0.322--
2013-07-22T09:32:00JayderManual testing263264--0.490--
2013-10-20T21:36:00David CampeauManual testing264265--0.933--
2015-05-15T22:09:00snme2pm1Manual testing265266--1.865--
2016-08-29T00:37:17kkmrkkblmbrbkManual testing266267--3.730--
2018-08-29T17:55:13mikrManual testing267268--7.461--
2019-04-11T18:20:26mikrManual testing268269--14.92--
2019-04-11T18:20:26mikrManual testing269270--29.84--


ECM factoring results:
Total ECM effort:2.160 GHz-days
Estimated T-Level:0.600
DigitsB1CurvesCompleteFacMiss
201100012 / 1000.12088.638%
255000012 / 2800.04395.797%

ECM Summary

B1B2factorcurvesGHz-days
500005000000122.160


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-12-30T00:00:00ANONYMOUSv4_computersF22B593468E5BF940.500


PRP results:
dateuseridcompidcofactorsres64PRP
2021-05-30T08:34:00RichD0CoLab-2
720987230884185534870238439
F21DBA9540057449no


P-1 factor-bounds graph:
B1 = 4600000, B2 = 125000000 (stage 2)
B1 = 4600000 (stage 1)
B1 = 225000, B2 = 4556250 (stage 2)
B1 = 120000, B2 = 2280000 (stage 2)
B1 = 225000 (stage 1)
B1 = 120000 (stage 1)
B1 = 65000, B2 = 1056250 (stage 2)
B1 = 40000, B2 = 600000 (stage 2)
B1 = 65000 (stage 1)
B1 = 40000 (stage 1)
B1 = 20000, B2 = 300000 (stage 2)
B1 = 20000 (stage 1)
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TF factor-bounds graph:
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Last modified: 2021-05-30T08:34:00+00:00