is 2 5575841 - 1
has 1678496 decimal digits
takes 0.881 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L5A2F7D1166CE020Adouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual272171.513868.0556%5000000642358899081.219511.0168%252.733371.5748%3.5193%
PrimeNet2620.110262.9032%240005500000.01213.1685%0.122264.0786%1.1754%
GPU722662.648665.1515%340007000000.01612.1586%2.664765.9038%0.7522%
Difference+6+168.8651+2.9040%+4966000+6422888990+81.2034+8.8582%+250.0685+5.6711%+2.7670%

Known prime factors:
No known factors for M5575841

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2000-08-01T00:00:00ANONYMOUSv4_computers2000020000---0.005--0.156%
2010-05-05T12:15:00Squeeky_SquirrelP4_2600650001121250---0.028--1.303%
2019-10-15T00:13:18harleei5-5250U_1600335000996625012---0.197--3.080%
2022-09-10T10:27:02Sid & AndySpeck50000006423588990---81.22--11.017%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2016-02-23T16:39:11Mark RoseManual testing21262--0.110--
2009-04-20T00:59:00GrunwalderGIMPManual testing262263--0.176--
2014-12-20T11:22:00NesowaManual testing263264--0.352--
2014-12-21T01:46:00monstManual testing264265--0.670--
2015-09-03T07:43:00snme2pm1Manual testing265266--1.340--
2016-08-01T01:09:43Gordon SpenceManual testing266267--2.680--
2018-07-05T15:05:47ramgeisManual testing267268--5.361--
2020-08-24T12:45:01TJAOIManual testing268269--10.72--
2021-08-19T16:26:55SRBaseManual testing269270--21.44--
2021-08-24T16:20:35SRBaseManual testing270271--42.89--
2021-10-26T14:49:29SRBaseManual testing271272--85.77--


ECM factoring results:
Total ECM effort:2.161 GHz-days
Estimated T-Level:1.731
DigitsB1CompleteFacMiss
20110000.34670.740%
25500000.03296.848%
302500000.00299.798%


ECM Summary

B1B2factorcurvesGHz-days
50000500000092.161


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2000-09-08T00:00:00ANONYMOUSv4_computers5A2F7D1166CE020A0.881


PRP results:
No PRP results for M5575841


P-1 factor-bounds graph:
B1 = 5000000, B2 = 6423588990 (P-1 stage 2)
B1 = 5000000 (P-1 stage 1)
B1 = 335000, B2 = 9966250 (P-1 stage 2)
B1 = 335000 (P-1 stage 1)
B1 = 65000, B2 = 1121250 (P-1 stage 2)
B1 = 65000 (P-1 stage 1)
B1 = 20000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-09-10T10:27:02+00:00