is 2 1845499 - 1
has 555551 decimal digits
takes 0.100 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LBF89012F2A190505double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26832.297469.1176%30000003000000001.50898.9739%33.806371.8890%2.7713%
PrimeNet2570.010463.1579%90001600000.00143.0217%0.011864.2712%1.1133%
GPU722610.166465.5738%90001500000.00131.6301%0.167866.1350%0.5612%
Difference+7+32.1310+3.5439%+2991000+299850000+1.5075+7.3437%+33.6385+5.7540%+5.7540%

Known prime factors (1 factor, 91.3 bits, 0.00494516% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
184549929707599651826023896565613372891.263804866316693371925332
22 × 1009 × 7033339 × 28353785183
2020-07-08703333928353785183273,617,369122.04226.96

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-02-07T12:37:00Carsten Kossendeyleela1000001700000---0.015--2.221%
2014-05-19T21:01:00Jocelyn LaroucheManual testing134779134779---0.011--0.925%
2014-09-25T01:53:00Jocelyn LaroucheManual testing169558169558---0.013--1.050%
2015-07-15T13:46:00mikrMSI278000091760000---0.600--7.496%
2018-08-06T14:03:26Jocelyn Larouchelow 4M184549918454990012---0.928--8.032%
2020-07-21T09:49:07ViliamFManual testing3000000300000000---1.509--8.974%
2020-07-22T20:11:54ViliamFManual testing15000000150000000---1.759--8.921%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2003-01-16T00:00:00ANONYMOUSv4_computers21258--0.021--
2016-02-23T16:28:54Mark RoseManual testing258260--0.062--
2010-04-08T13:19:00Architects CubedManual testing260261--0.083--
2016-02-23T16:28:54Mark RoseManual testing261262--0.166--
2011-01-21T16:11:00GrunwalderGIMPManual testing21263--0.865--
2016-02-23T16:28:54Mark RoseManual testing262263--0.532--
2015-04-27T21:09:00snme2pm1Manual testing263264--1.064--
2015-04-27T21:09:00snme2pm1Manual testing264265--2.025--
2015-09-07T08:31:00ramgeisManual testing265266--4.049--
2017-11-03T14:18:45TJAOIManual testing266267--8.098--
2019-06-24T09:36:01TJAOIManual testing267268--16.20--


ECM factoring results:

Old Calculation Method

Total ECM effort:18.331 GHz-days
Estimated T-Level:24.482
DigitsB1CurvesCompleteFacMiss
2011000251 / 1002.5108.025%
2550000251 / 2800.89640.737%

New Calculation Method

Total ECM effort:18.331 GHz-days
Estimated T-Level:24.482
DigitsB1CompleteFacMiss
20110008.3440.024%
25500000.75546.999%
302500000.04795.446%
3510000000.00299.786%


ECM Summary

B1B2factorcurvesGHz-days
5000050000001389.54
50000500000020.138
5000066000001118.653


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-12-27T00:00:00ANONYMOUSv4_computersBF89012F2A1905050.100
2016-06-02T10:52:57MadPooManual testingBF89012F2A1905050.100


PRP results:
dateuseridcompidcofactorsres64PRP
2020-07-10T12:04:37mnd9mnd
2970759965182602389656561337
CCA7CCAE4C8E64DBno
2020-07-19T17:54:07ViliamF3
2970759965182602389656561337
CCA7CCAE4C8E64DBno


P-1 factor-bounds graph:
B1 = 15000000, B2 = 150000000 (P-1 stage 2)
B1 = 3000000, B2 = 300000000 (P-1 stage 2)
B1 = 15000000 (P-1 stage 1)
B1 = 1845499, B2 = 184549900 (P-1 stage 2)
B1 = 2780000, B2 = 91760000 (P-1 stage 2)
B1 = 3000000 (P-1 stage 1)
B1 = 2780000 (P-1 stage 1)
B1 = 1845499 (P-1 stage 1)
B1 = 100000, B2 = 1700000 (P-1 stage 2)
B1 = 169558 (P-1 stage 1)
B1 = 134779 (P-1 stage 1)
B1 = 100000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2021-05-28T18:40:56+00:00