is 2 1819043 - 1
has 547587 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
Actual26716.334968.6567%500000150000000.10155.0649%16.436470.2442%1.5875%
PrimeNet2570.010663.1579%80001500000.00122.8758%0.011864.2174%1.0595%
GPU722610.168965.5738%90001300000.00121.5577%0.170166.1100%0.5363%
Difference+6+16.1660+3.0829%+491000+14870000+0.1002+3.5072%+16.2663+4.1342%+4.1342%

Known prime factors (3 factors, 123.2 bits, 0.00677073% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
18190433638087721.7951
1
-111.536e-137.866e-81.601e-7
1819043582093761929.117160
25 × 5
2008-07-1532324.068e-112.517e-65.123e-6
181904356201393612649611194392272.2511544806626689133
32 × 19 × 71 × 127238829313
2019-10-0771127238829313836.79545.311,018.5

4 Composite Factors:
exponentprime factorscomposite factordigitsbits*
181904321177077446752071650.911
1819043204465559484063586041364731932994.046
1819043327144805814285893553301772007931101.368
18190431190181265150477923619650983818904887338123.163
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-16T12:37:47alpertronManual testing5000001500000012-
skipped known factor: 3638087
skipped known factor: 582093761
--0.101--5.065%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2008-07-15T07:46:00J FeitsmaManual testing??29.11791.36166e-120.2112.91506e-12


ECM factoring results:

Old Calculation Method

Total ECM effort:18.624 GHz-days
Estimated T-Level:24.482
DigitsB1CurvesCompleteFacMiss
2011000251 / 1002.5108.025%
2550000251 / 2800.89640.737%

New Calculation Method

Total ECM effort:18.624 GHz-days
Estimated T-Level:24.482
DigitsB1CompleteFacMiss
20110008.4260.022%
25500000.76346.636%
302500000.04795.397%
3510000000.00299.784%


ECM Summary

B1B2factorcurvesGHz-days
5000050000001006.902
50000500000030.207
50000660000014811.51


Lucas-Lehmer results:
No L-L results for M1819043


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-03T22:52:15Oliver KruseGTX-1
3638087
582093761
AEB9EE41ED3EBE__no
2017-11-06T02:48:50kkmrkkblmbrbkold
3638087
582093761
AEB9EE41ED3EBE__no
2019-10-08T12:46:33mnd9libproj
3638087
582093761
5620139361264961119439
60603CC512414B50no
2019-10-12T19:53:30Chang Chia-Tcheexbpc13
3638087
582093761
5620139361264961119439
60603CC512414B50no


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
100
101
102
103
104
105
106
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109
1010
1011
1012
TF factor-bounds graph:
267
2
220
230
240
250
260
270
280
290
2100
Last modified: 2021-03-19T18:34:55+00:00