is 2 1816489 - 1
has 546818 decimal digits
takes 0.099 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
-unknown- primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26716.357968.6567%500000150000000.10155.0641%16.459470.2440%1.5872%
PrimeNet2570.010663.1579%80001500000.00122.8751%0.011864.2171%1.0592%
GPU722610.169165.5738%90001300000.00121.5573%0.170366.1099%0.5361%
Difference+6+16.1888+3.0829%+491000+14870000+0.1002+3.5068%+16.2890+4.1341%+4.1341%

Known prime factors (3 factors, 135.1 bits, 0.00743964% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
181648943595737825.37812
22 × 3
-442.467e-123.146e-76.404e-7
1816489508616921928.922140
22 × 5 × 7
2008-07-15572.028e-114.019e-78.005e-7
181648921649913592183157535824812580.841595927462048577160
23 × 3 × 5 × 1180253 × 4207625131
2020-05-3111802534207625131225,83718.12133.680

4 Composite Factors:
exponentprime factorscomposite factordigitsbits*
1816489221735295216657771754.300
18164899438439390375421917613864948349732106.218
1816489110115123911722472539291620576100134109.763
18164894800549981777864129812679656939448445273741135.140
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-16T12:37:33alpertronManual testing5000001500000012-
skipped known factor: 43595737
skipped known factor: 508616921
--0.101--5.064%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2008-07-15T07:46:00J FeitsmaManual testing??28.92295.96564e-130.2111.27734e-12


ECM factoring results:

Old Calculation Method

Total ECM effort:17.322 GHz-days
Estimated T-Level:24.482
DigitsB1CurvesCompleteFacMiss
2011000251 / 1002.5108.025%
2550000251 / 2800.89640.737%

New Calculation Method

Total ECM effort:17.322 GHz-days
Estimated T-Level:24.482
DigitsB1CompleteFacMiss
20110008.0970.030%
25500000.73248.105%
302500000.04595.594%
3510000000.00299.794%


ECM Summary

B1B2factorcurvesGHz-days
50000500000021214.63
500005000000392.691


Lucas-Lehmer results:
No L-L results for M1816489


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-03T22:13:47Oliver KruseGTX-3
43595737
508616921
DBA6A2D156C00A__no
2017-11-05T21:44:18kkmrkkblmbrbkc4.xlarge
43595737
508616921
DBA6A2D156C00A__no
2020-06-01T04:19:57CrypticCluecruncher
43595737
508616921
2164991359218315753582481
C54BDCADD1095519no
2020-06-02T13:46:52Luigi Morelli9800X
43595737
508616921
2164991359218315753582481
C54BDCADD1095519no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
100
101
102
103
104
105
106
107
100
101
102
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
267
2
220
230
240
250
260
270
280
290
2100
Last modified: 2021-02-26T17:52:56+00:00