is 2 1863347 - 1
has 560924 decimal digits
takes 0.101 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LB14B2F84834842C8double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26715.946568.6567%500000150000000.10155.0796%16.048070.2488%1.5921%
PrimeNet2570.010363.1579%90001600000.00143.0271%0.011764.2731%1.1153%
GPU722610.164965.5738%100001500000.00141.6884%0.166266.1550%0.5813%
Difference+6+15.7817+3.0829%+490000+14850000+0.1001+3.3912%+15.8818+4.0938%+4.0938%

Known prime factors (1 factor, 71.4 bits, 0.00382935% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
186334730180061604811146239432271.354809834711538193
11 × 811 × 90778467833
2015-03-1981190778467833343.96389.05726.64

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2012-01-06T09:11:00markrtiny2750006000000---0.046--3.926%
2016-03-16T12:37:16alpertronManual testing5000001500000012---0.101--5.080%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2003-01-09T00:00:00ANONYMOUSv4_computers21258--0.021--
2010-04-06T01:39:00Architects CubedManual testing260261--0.082--
2011-03-08T05:14:00GrunwalderGIMPManual testing21263--0.857--


ECM factoring results:

Old Calculation Method

Total ECM effort:20.312 GHz-days
Estimated T-Level:24.732
DigitsB1CurvesCompleteFacMiss
2011000265 / 1002.6506.972%
2550000265 / 2800.94638.747%

New Calculation Method

Total ECM effort:20.312 GHz-days
Estimated T-Level:24.732
DigitsB1CompleteFacMiss
20110009.0440.012%
25500000.81944.073%
302500000.05195.058%
3510000000.00299.767%


ECM Summary

B1B2factorcurvesGHz-days
500005000000392.699
50000500000030.208
50000660000022317.41


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-12-13T00:00:00ANONYMOUSv4_computersB14B2F84834842C80.101


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-04T09:28:17Oliver KruseGTX-3
3018006160481114623943
27A6A4608BB1F9__no
2017-11-07T09:47:49kkmrkkblmbrbkc4.xlarge
3018006160481114623943
27A6A4608BB1F9__no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 275000, B2 = 6000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 275000 (P-1 stage 1)
101
102
103
104
105
106
101
102
103
104
105
106
107
108
109
1010
1011
TF factor-bounds graph:
267
263
261
258
250
260
270
280
290
2100
Last modified: 2021-08-27T10:08:03+00:00