is 2 1828829 - 1
has 550533 decimal digits
takes 0.099 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L5AFC2BE13228B01Fdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26832.591869.1176%18288291828829000.91988.0073%33.511671.5905%2.4728%
PrimeNet2570.010563.1579%80001500000.00122.8788%0.011764.2185%1.0606%
GPU722610.168065.5738%90001400000.00131.5944%0.169266.1227%0.5489%
Difference+7+32.4239+3.5439%+1819829+182742900+0.9185+6.4129%+33.3424+5.4678%+5.4678%

Known prime factors (1 factor, 85.7 bits, 0.00468402% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1828829612441203043024447322061692685.66316744080584981549596
22 × 4327 × 1086557 × 890352341
2019-12-1210865578903523415,523,5643.89667.1269

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-02-04T20:56:00kurlykurlytop1150002328750---0.019--2.460%
2014-08-21T21:47:00Jocelyn LaroucheManual testing150096150096---0.012--0.980%
2014-10-18T13:18:00Jocelyn LaroucheManual testing185192185192---0.015--1.098%
2015-06-16T04:47:00mikrMSI278000091760000---0.600--7.489%
2018-08-20T12:01:24Jocelyn Larouchelow 4M182882918288290012---0.920--8.007%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2003-01-16T00:00:00ANONYMOUSv4_computers21258--0.021--
2016-02-23T16:28:54Mark RoseManual testing258260--0.063--
2010-04-10T15:57:00Architects CubedManual testing260261--0.084--
2016-02-23T16:28:54Mark RoseManual testing261262--0.168--
2011-04-05T20:59:00GrunwalderGIMPManual testing21263--0.873--
2016-02-23T16:28:54Mark RoseManual testing262263--0.537--
2015-04-25T23:44:00snme2pm1Manual testing263264--1.074--
2015-04-25T23:44:00snme2pm1Manual testing264265--2.043--
2015-09-04T17:59:00ramgeisManual testing265266--4.086--
2018-04-09T13:44:24TJAOIManual testing266267--8.172--
2019-06-17T12:15:00TJAOIManual testing267268--16.34--


ECM factoring results:

Old Calculation Method

Total ECM effort:18.927 GHz-days
Estimated T-Level:24.482
DigitsB1CurvesCompleteFacMiss
2011000251 / 1002.5108.025%
2550000251 / 2800.89640.737%

New Calculation Method

Total ECM effort:18.927 GHz-days
Estimated T-Level:24.482
DigitsB1CompleteFacMiss
20110008.4990.020%
25500000.77046.315%
302500000.04895.353%
3510000000.00299.782%


ECM Summary

B1B2factorcurvesGHz-days
500005000000694.765
50000500000010.069
50000660000018114.09


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-03-26T00:00:00ANONYMOUSv4_computers5AFC2BE13228B01F0.099
2015-07-18T18:30:00MadPooManual testing5AFC2BE13228B01F0.099


PRP results:
dateuseridcompidcofactorsres64PRP
2019-12-13T11:25:33Niels_Mache_NextcloudSuperDry-X
61244120304302444732206169
B2DB767DF0C32C66no
2019-12-14T07:25:29marssystemssystem03
61244120304302444732206169
B2DB767DF0C32C66no


P-1 factor-bounds graph:
B1 = 1828829, B2 = 182882900 (P-1 stage 2)
B1 = 2780000, B2 = 91760000 (P-1 stage 2)
B1 = 2780000 (P-1 stage 1)
B1 = 1828829 (P-1 stage 1)
B1 = 115000, B2 = 2328750 (P-1 stage 2)
B1 = 185192 (P-1 stage 1)
B1 = 150096 (P-1 stage 1)
B1 = 115000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2021-04-23T12:19:02+00:00