is 2 19189757 - 1
has 5776693 decimal digits
takes 12.233 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LBC1FE1F106D14A67double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27399.680565.7534%150000018166260010.46006.5691%110.140568.0031%2.2497%
PrimeNet2650.380261.5385%9000028000000.21974.8391%0.599963.3997%1.8612%
GPU722696.221463.7681%14000040000000.32383.6067%6.545265.0749%1.3068%
Difference+4+93.4591+1.9853%+1360000+177662600+10.1362+2.9623%+103.5953+2.9282%+2.9282%

Known prime factors:
No known factors for M19189757

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-05-11T00:00:00ANONYMOUSv4_computers2250004443750---0.420--2.575%
2022-03-26T05:54:35Sid & AndyRocky1500000181662600---10.46--6.569%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-10-27T00:00:00Net_Forcev4_computers21258--0.002--
2002-01-15T00:00:00Net_Forcev4_computers21259--0.004--
2002-10-07T00:00:00ANONYMOUSv4_computers21264--0.185--
2002-10-19T00:00:00ANONYMOUSv4_computers21266--0.770--
2014-07-06T00:26:00NesowaManual testing266267--0.779--
2014-07-06T00:26:00NesowaManual testing267268--1.558--
2017-11-30T10:52:49ramgeisManual testing268269--3.115--
2019-12-30T12:56:10lycornManual testing269270--6.231--
2021-09-12T16:26:53SRBaseManual testing270271--12.46--
2021-10-01T19:29:52-Anonymous-Manual testing271272--24.92--
2021-11-12T20:15:42-Anonymous-Manual testing272273--49.84--


ECM factoring results:

Old Calculation Method

Total ECM effort:0.969 GHz-days
Estimated T-Level:0.050
DigitsB1CurvesCompleteFacMiss
20110001 / 1000.01099.000%
25500001 / 2800.00499.643%

New Calculation Method

Total ECM effort:0.969 GHz-days
Estimated T-Level:0.050
DigitsB1CompleteFacMiss
20110000.03896.227%
25500000.00499.645%


ECM Summary

B1B2factorcurvesGHz-days
50000500000010.969


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2003-05-26T00:00:00ANONYMOUSv4_computersBC1FE1F106D14A6712.23
2007-05-12T00:00:00scineramv4_computersBC1FE1F106D14A6712.23


PRP results:
No PRP results for M19189757


P-1 factor-bounds graph:
B1 = 1500000, B2 = 181662600 (P-1 stage 2)
B1 = 1500000 (P-1 stage 1)
B1 = 225000, B2 = 4443750 (P-1 stage 2)
B1 = 225000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-03-26T05:54:35+00:00