is 2 1806041 - 1
has 543673 decimal digits
takes 0.098 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LA9C5F10D4D193F69double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual270132.306370.0000%500000150000000.10153.7683%132.407871.1305%1.1305%
PrimeNet2570.010663.1579%80001500000.00122.8720%0.011964.2160%1.0581%
GPU722610.170165.5738%90001300000.00121.5554%0.171366.1092%0.5355%
Difference+9+132.1362+4.4262%+491000+14870000+0.1002+2.2128%+132.2365+5.0212%+5.0212%

Known prime factors (1 factor, 65.9 bits, 0.00364834% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1806041683964556713179757432065.89118935465936631
3 × 19 × 61 × 131 × 41571913
2014-01-16131415719136.39590.17820.3328

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-09-21T00:00:00ANONYMOUSv4_computers25000387500---0.004--0.769%
2011-02-07T12:49:00Carsten Kossendeyleela1000001650000---0.015--1.718%
2016-03-16T12:36:24alpertronManual testing5000001500000012---0.101--3.768%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2003-01-25T00:00:00ANONYMOUSv4_computers21258--0.021--
2010-04-11T14:32:00Architects CubedManual testing260261--0.085--
2010-12-13T03:33:00GrunwalderGIMPManual testing21263--0.884--
2011-02-02T20:14:00Matteo2D263264--1.087--
2013-11-12T13:19:00David CampeauManual testing264265--2.069--
2014-01-04T17:23:00Never Odd Or EvenManual testing265266--4.138--
2014-01-16T14:32:00Never Odd Or EvenManual testing26526665.891202.3560.1994.793
2014-01-04T17:23:00Never Odd Or EvenManual testing266267--8.275--
2014-01-04T17:23:00Never Odd Or EvenManual testing267268--16.55--
2014-01-04T17:23:00Never Odd Or EvenManual testing268269--33.10--
2014-01-04T17:23:00Never Odd Or EvenManual testing269270--66.20--


ECM factoring results:

Old Calculation Method

Total ECM effort:17.311 GHz-days
Estimated T-Level:24.482
DigitsB1CurvesCompleteFacMiss
2011000251 / 1002.5108.025%
2550000251 / 2800.89640.737%

New Calculation Method

Total ECM effort:17.311 GHz-days
Estimated T-Level:24.482
DigitsB1CompleteFacMiss
20110008.0970.030%
25500000.73248.105%
302500000.04595.594%
3510000000.00299.794%


ECM Summary

B1B2factorcurvesGHz-days
50000500000025117.31


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-03-15T00:00:00ANONYMOUSv4_computersA9C5F10D4D193F690.098


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-03T19:52:14Oliver KruseGTX-0
68396455671317975743
AE53D0EE99425D__no
2017-11-05T14:45:40kkmrkkblmbrbkc4.xlarge
68396455671317975743
AE53D0EE99425D__no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 100000, B2 = 1650000 (P-1 stage 2)
B1 = 100000 (P-1 stage 1)
B1 = 25000, B2 = 387500 (P-1 stage 2)
B1 = 25000 (P-1 stage 1)
101
102
103
104
105
106
101
102
103
104
105
106
107
108
TF factor-bounds graph:
270
269
268
267
266
265
264
263
261
258
250
260
270
280
290
2100
Last modified: 2021-02-26T17:52:33+00:00