is 21187803-1
has 357565 decimal digits
takes 0.036 GHz-days to do one L-L test
Last-known PrimeNet details:
0 L-L tests remaining
ResidueStatus
L-L89F094002DF82383double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26612.433468.1818%85000000085000000000241.664122.2224%254.097590.4042%27.9042%
PrimeNet2560.008162.5000%5000800000.00042.2652%0.008564.7652%2.2652%
GPU722600.129365.0000%5000280000.00030.8010%0.129665.8010%0.8010%
Difference+6+12.3041+3.1818%+849995000+84999972000+241.6638+21.4214%+253.9679+24.6032%+24.6032%

Known prime factors (2 factors, 207.0 bits, 0.01742578% known):
Remaining cofactor is not a probable-prime

GHz-days
exponentfactordigitsbits*kmin B1min B2date foundmin. TFmin. P-1normal P-1
118780311290506950091260393772269.936475268497810296
23 × 3 × 19802854075429
8198028540754292016-09-15101.2947,97689,605
118780318015386430342496999955842482702432405049742137.04875834908778402214003314701523326816
25 × 7 × 17 × 83 × 149 × 2087 × 2689 × 4999 × 36343 × 1254971 × 1258511
125497112585112016-07-291.530e+110.05580.1136

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
118780320340284570036174451790736019623808170870237134043
6643758420369
63206.984
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-05-05T00:00:00Jocelyn Larouchev4_computers10001000---4.44667e-5--0.007%
2002-09-14T00:00:00Jocelyn Larouchev4_computers40004000---0.000--0.062%
2002-09-14T00:00:00Jocelyn Larouchev4_computers50005000---0.000--0.081%
2002-09-22T00:00:00Jocelyn Larouchev4_computers80008000---0.000--0.135%
2002-09-29T00:00:00Jocelyn Larouchev4_computers1000010000---0.000--0.169%
2003-09-21T00:00:00ANONYMOUSv4_computers100001000000---0.003--1.162%
2013-10-01T21:06:00David Campeaui5-2500k121000035090000---0.136--6.754%
2016-07-29T09:31:52Bruno Victal5820K-factoring250000026420180583042137.0480.1110.0730.22218.459%
2016-11-09T03:45:06Bruno VictalManual testing1000000077737104492---188.8--18.758%
2016-11-10T04:27:18Bruno VictalManual testing10000000128970154188---312.9--19.444%
2016-11-14T20:02:31Bruno VictalManual testing10000000264201805830---640.5--20.406%
2021-01-15T12:43:33Bruno VictalManual testing8500000008500000000012---241.7--22.222%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-11-03T00:00:00ANONYMOUSv4_computers?257--0.016--
2003-05-11T00:00:00ANONYMOUSv4_computers?258--0.032--
2016-02-23T16:28:24Mark RoseManual testing258260--0.097--
2009-03-30T04:05:00Sturle Sundebach.ifi260261--0.129--
2012-09-08T10:00:00AxelssonManual testing261262--0.259--
2012-11-24T17:08:00dbaughManual testing262263--0.826--
2015-01-03T05:42:00Matthias WurtingerManual testing263264--1.653--
2015-01-05T07:29:00lycornManual testing264265--3.146--
2015-09-30T08:41:12ramgeisManual testing265266--6.291--


ECM factoring results:
ECM Summary

B1B2factorcurvesGHz-days
5000050000002177.990
50000500000060.221
2500002500000052095.73
10000001000000001,183871.1
3000000300000000107236.4


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2015-11-11T19:33:21MadPooManual testing89F094002DF823830.036


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-29T11:28:31Oliver KruseGTX-2
1129050695009126039377
180153864303424969999558424827024324050497
949C59E8AB1A25BAno
2017-10-05T21:28:22Oliver KruseManual testing
1129050695009126039377
180153864303424969999558424827024324050497
949C59E8AB1A25__no
2017-10-17T18:10:13Oliver KruseThreadripper
1129050695009126039377
180153864303424969999558424827024324050497
949C59E8AB1A25__no
2018-01-03T05:45:47ATHec2-8x
1129050695009126039377
180153864303424969999558424827024324050497
949C59E8AB1A25__no


P-1 factor-bounds graph:
B1 = 10000000, B2 = 264201805830 (stage 2)
B1 = 2500000, B2 = 264201805830 (stage 2)
B1 = 10000000, B2 = 128970154188 (stage 2)
B1 = 850000000, B2 = 85000000000 (stage 2)
B1 = 10000000, B2 = 77737104492 (stage 2)
B1 = 850000000 (stage 1)
B1 = 10000000 (stage 1)
B1 = 1210000, B2 = 35090000 (stage 2)
B1 = 2500000 (stage 1)
B1 = 1210000 (stage 1)
B1 = 10000, B2 = 1000000 (stage 2)
B1 = 10000 (stage 1)
B1 = 8000 (stage 1)
B1 = 5000 (stage 1)
B1 = 4000 (stage 1)
B1 = 1000 (stage 1)
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TF factor-bounds graph:
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Last modified: 2021-01-15T12:43:33+00:00