is 2 4609489 - 1
has 1387595 decimal digits
takes 0.607 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LE6E4F7C0EEEAB3B7double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual272207.470668.0556%1988203616343031.00005.3332%208.470669.7592%1.7037%
PrimeNet2610.066662.2951%190004000000.00763.0769%0.074263.4552%1.1601%
GPU722651.582864.6154%280006000000.01132.1878%1.594165.3895%0.7741%
Difference+7+205.8879+3.4402%+1960203+61034303+0.9887+3.1454%+206.8766+4.3697%+4.3697%

Known prime factors:
No known factors for M4609489

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2009-08-26T11:29:00Carsten Kossendeydurandal25000375000---0.008--0.678%
2012-01-21T14:55:00Squeeky_SquirrelT7500_22001100002035000---0.041--1.680%
2017-12-07T12:35:27Ismo Laitela6600K19882036163430312---1.000--5.333%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-08-24T00:00:00ANONYMOUSv4_computers21261--0.067--
2010-08-06T06:00:00markrut261262--0.067--
2011-12-09T05:23:00GrunwalderGIMPManual testing21263--0.346--
2016-02-23T16:38:56Mark RoseManual testing262263--0.213--
2015-01-17T21:47:00JayderManual testing263264--0.426--
2015-01-18T16:40:00monstManual testing264265--0.811--
2015-07-04T23:47:00snme2pm1Manual testing265266--1.621--
2018-05-01T20:29:04Gordon SpenceManual testing266267--3.242--
2018-09-29T01:29:25chuenkitManual testing267268--6.485--
2021-03-22T11:29:17-Anonymous-Manual testing268269--12.97--
2021-03-22T11:29:17-Anonymous-Manual testing269270--25.94--
2021-03-22T11:29:17-Anonymous-Manual testing270271--51.88--
2021-03-24T11:27:14-Anonymous-Manual testing271272--103.8--


ECM factoring results:

Old Calculation Method

Total ECM effort:1.766 GHz-days
Estimated T-Level:0.450
DigitsB1CurvesCompleteFacMiss
20110009 / 1000.09091.352%
25500009 / 2800.03296.831%

New Calculation Method

Total ECM effort:1.766 GHz-days
Estimated T-Level:0.450
DigitsB1CompleteFacMiss
20110000.34670.740%
25500000.03296.848%
302500000.00299.798%


ECM Summary

B1B2factorcurvesGHz-days
50000500000091.766


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2015-11-14T18:09:13MadPooManual testingE6E4F7C0EEEAB3B70.607


PRP results:
No PRP results for M4609489


P-1 factor-bounds graph:
B1 = 1988203, B2 = 61634303 (P-1 stage 2)
B1 = 1988203 (P-1 stage 1)
B1 = 110000, B2 = 2035000 (P-1 stage 2)
B1 = 110000 (P-1 stage 1)
B1 = 25000, B2 = 375000 (P-1 stage 2)
B1 = 25000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2021-03-24T11:27:14+00:00