is 2 19000027 - 1
has 5719579 decimal digits
takes 12.113 GHz-days to do one PRP test
Last-known PrimeNet details:
0 L-L tests remaining
ResidueStatus
L-L73821496FE34D23Adouble-checked
PRP99E6D235ED134543

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27012.576364.2857%430000174150001.25295.0779%13.829266.0993%4.5608%
PrimeNet2650.384061.5385%9000028000000.21974.8325%0.603763.3971%1.8587%
GPU722696.283563.7681%13000036000000.29493.4799%6.578465.0290%1.2608%
Difference+1+6.2928+0.5176%+300000+13815000+0.9580+1.5980%+7.2508+1.0703%+1.0703%

Known prime factors (1 factor, 75.8 bits, 0.00039914% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
19000027674808533051253464353192375.8371775809405563617
4021 × 441633774077
2021-04-284021441633774077634.3522,24241,541

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2019-07-22T03:06:33James Heinrichi3-8100380000798000012---0.734--4.309%
2020-04-09T20:51:55timbitManual testing4300001741500012---1.253--5.078%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2021-04-28T21:04:47LaurVZero81810000005700000065P+12375.8374.137


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-06-15T00:00:00bradypev4_computers?264--0.103--
2002-04-07T00:00:00ANONYMOUSv4_computers?266--0.393--
2012-11-08T20:07:00GrunwalderGIMPi5Laptop266267--0.787--
2012-11-09T00:54:00GrunwalderGIMPi5Laptop267268--1.573--
2014-03-31T17:10:00ramgeisManual testing268269--3.146--
2014-03-31T17:10:00ramgeisManual testing269270--6.293--


ECM factoring results:
Total ECM effort:2.908 GHz-days
Estimated T-Level:0.150
DigitsB1CurvesCompleteFacMiss
20110003 / 1000.03097.030%
25500003 / 2800.01198.932%

ECM Summary

B1B2factorcurvesGHz-days
50000500000032.908


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2007-04-07T00:00:00hoannisv4_computers73821496FE34D23A12.11


PRP results:
dateuseridcompidcofactorsres64PRP
2020-08-31T15:10:56KrieselManual testing99E6D235ED134543no


P-1 factor-bounds graph:
B1 = 430000, B2 = 17415000 (stage 2)
B1 = 380000, B2 = 7980000 (stage 2)
B1 = 430000 (stage 1)
B1 = 380000 (stage 1)
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106
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1010
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TF factor-bounds graph:
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268
267
266
264
250
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2100
Last modified: 2021-04-28T21:04:47+00:00