is 2 2234549 - 1
has 672667 decimal digits
takes 0.147 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L0800DA9BE0F887E2double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26826.674267.6471%2000000650000000.51797.0382%27.192169.9241%2.2771%
PrimeNet2580.017262.0690%100001800000.00182.8713%0.019063.1581%1.0891%
GPU722620.274964.5161%110001900000.00201.6577%0.276965.1043%0.5882%
Difference+6+26.3993+3.1309%+1989000+64810000+0.5159+5.3805%+26.9152+4.8198%+4.8198%

Known prime factors (1 factor, 83.5 bits, 0.00373578% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
2234549134698708948941077112331692683.4783014002130831346216
23 × 3 × 109 × 1549 × 743796957599		2020-02-2915497437969575991,304,7393,863.57,215.9

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-03-27T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.227%
2010-10-27T12:36:00Oscar Östlin7501175011---0.007--0.675%
2011-01-14T06:33:00Oscar Östlin850001615000---0.016--2.185%
2014-06-01T23:28:00Jocelyn LaroucheManual testing113724113724---0.011--0.869%
2014-09-30T23:23:00Jocelyn LaroucheManual testing142448142448---0.014--0.987%
2015-11-30T19:59:54Alexander DubrovinManual testing100000050000006---0.116--3.986%
2016-01-08T20:45:21Alexander DubrovinManual testing20000006500000012---0.518--7.038%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-02-07T00:00:00ANONYMOUSv4_computers21258--0.017--
2016-02-23T16:29:09Mark RoseManual testing258260--0.052--
2009-01-11T03:48:00Sturle Sundegoldiek.ifi260261--0.069--
2012-04-20T19:47:00Sebastian HornbostelManual testing261262--0.137--
2013-01-23T08:24:00dbaughManual testing262263--0.439--
2015-03-10T10:44:00VictordeHollanderManual testing263264--0.879--
2015-03-10T10:44:00VictordeHollanderManual testing264265--1.672--
2015-10-25T20:35:11ramgeisManual testing265266--3.344--
2016-12-30T02:46:27Gordon SpenceManual testing266267--6.688--
2019-04-08T13:40:38TJAOIManual testing267268--13.38--


ECM factoring results:

Old Calculation Method

Total ECM effort:4.032 GHz-days
Estimated T-Level:2.350
DigitsB1CurvesCompleteFacMiss
201100047 / 1000.47062.353%
255000047 / 2800.16884.522%

New Calculation Method

Total ECM effort:4.032 GHz-days
Estimated T-Level:2.350
DigitsB1CompleteFacMiss
20110001.51621.956%
25500000.13787.195%
302500000.00899.160%


ECM Summary

B1B2factorcurvesGHz-days
500005000000453.860
50000500000020.172


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-05-02T00:00:00ANONYMOUSv4_computers0800DA9BE0F887E20.147
2018-04-20T22:42:47kkmrkkblmbrbkold0800DA9BE0F887E20.147


PRP results:
dateuseridcompidcofactorsres64PRP
2020-03-01T12:48:58Christoph ZengerManual testing
13469870894894107711233169
81EA36F88D81D8BBno
2020-03-01T17:16:06Niels_Mache_NextcloudSuperDry-X
13469870894894107711233169
81EA36F88D81D8BBno


P-1 factor-bounds graph:
B1 = 2000000, B2 = 65000000 (P-1 stage 2)
B1 = 2000000 (P-1 stage 1)
B1 = 1000000, B2 = 5000000 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
B1 = 85000, B2 = 1615000 (P-1 stage 2)
B1 = 142448 (P-1 stage 1)
B1 = 113724 (P-1 stage 1)
B1 = 85000 (P-1 stage 1)
B1 = 75011 (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: 2020-03-01T17:16:06+00:00