is 2 1463611 - 1
has 440591 decimal digits
takes 0.056 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L071A6CA93D7245ACdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26720.301868.6567%2500000625000000.31947.4139%20.621270.9805%2.3238%
PrimeNet2560.006662.5000%70001200000.00072.9093%0.007363.5910%1.0910%
GPU722600.104965.0000%65001000000.00061.4457%0.105665.5060%0.5060%
Difference+7+20.1968+3.6567%+2493500+62400000+0.3187+5.9682%+20.5156+5.4745%+5.4745%

Known prime factors (1 factor, 77.1 bits, 0.00526958% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
14636111649262882689945673146332477.12656342254966994156
22 × 14085563741748539
2017-08-3141408556374174853924,42542,485,77779,351,600

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-09-29T00:00:00Team Prime Ribv4_computers15000243750---0.002--0.840%
2009-04-02T11:57:00axnManual testing80000016000000---0.090--5.262%
2015-05-19T11:20:00alpertronManual testing200000060000000---0.286--7.236%
2016-08-23T20:39:04Bruno Victal5820K-factoring25000006250000012---0.319--7.414%
2016-08-27T10:54:01Bruno VictalManual testing25000006250000012---0.319--7.414%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-10-06T00:00:00ANONYMOUSv4_computers21257--0.013--
2003-07-30T00:00:00ANONYMOUSv4_computers21258--0.026--
2016-02-23T16:28:33Mark RoseManual testing258260--0.079--
2010-05-09T12:30:00Architects Cubeda3_bu2260261--0.105--
2016-02-23T16:28:33Mark RoseManual testing261262--0.210--
2011-03-08T05:14:00GrunwalderGIMPManual testing21263--1.090--
2016-02-23T16:28:33Mark RoseManual testing262263--0.671--
2015-03-30T23:37:00snme2pm1Manual testing263264--1.341--
2015-03-30T23:37:00snme2pm1Manual testing264265--2.553--
2015-09-20T20:59:00ramgeisManual testing265266--5.106--


ECM factoring results:

Old Calculation Method

Total ECM effort:25.576 GHz-days
Estimated T-Level:25.391
DigitsB1CurvesCompleteFacMiss
2011000301 / 1003.0104.855%
2550000301 / 2801.07534.064%
3025000050 / 6400.07892.479%

New Calculation Method

Total ECM effort:25.576 GHz-days
Estimated T-Level:25.391
DigitsB1CompleteFacMiss
201100012.2630.000%
25500001.35725.749%
302500000.11389.315%
3510000000.00899.236%


ECM Summary

B1B2factorcurvesGHz-days
50000500000024911.81
50000500000020.095
250000350000005013.67


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-02-14T00:00:00ANONYMOUSv4_computers071A6CA93D7245AC0.056
2015-06-27T00:56:00MadPooManual testing071A6CA93D7245AC0.056


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-01T03:34:46Oliver KruseGTX-0
164926288268994567314633
4578436E8C7868__no
2017-10-27T22:35:33kkmrkkblmbrbkc4.xlarge
164926288268994567314633
4578436E8C7868__no


P-1 factor-bounds graph:
B1 = 2500000, B2 = 62500000 (P-1 stage 2)
B1 = 2000000, B2 = 60000000 (P-1 stage 2)
B1 = 2500000 (P-1 stage 1)
B1 = 2000000 (P-1 stage 1)
B1 = 800000, B2 = 16000000 (P-1 stage 2)
B1 = 800000 (P-1 stage 1)
B1 = 15000, B2 = 243750 (P-1 stage 2)
B1 = 15000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-01-25T11:43:54+00:00