is 2 642589933 - 1
has 193438845 decimal digits
takes 19,433.883 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP73CECA1C5EDD864DPRP-tested

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2846,096.995064.2857 %5740000172200000649.41944.3068 %6,746.414465.8238 %
Target2833,048.497463.8554 %36000008000000002,060.62874.4104 %5,109.126165.4496 %
Difference+1+3,048.4976+0.4303 %+2140000-627800000-1,411.2093-0.1037 %+1,637.2883+0.3743 %

Known prime factors:
No known factors for M642589933

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2020-06-19Krieselasrock5740000172200000--649.34.676%


Trial Factoring results:
57585960616263646566676869707172737475767778798081828384
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2014-03-23america64Manual testing2652660.012
2014-06-20sasakii7-office2662670.023
2017-01-22sasakiManual testing2672680.047
2017-05-02sasakiManual testing2682690.093
2018-09-21Niels_Mache_NextcloudManual testing2692700.186
2020-05-31KrieselManual testing2702846,097


ECM factoring results:
No ECM results for M642589933


Lucas-Lehmer results:
No L-L results for M642589933


PRP results:
dateuseridcompidcofactorsres64
2021-05-18KrieselManual testing73CECA1C5EDD864D


CERT results:
dateuseridcompid
2021-05-26George Woltmanh110itx6


P-1 factor-bounds graph:
B1 = 5740000, B2 = 172200000 (P-1 stage 2)
B1 = 5740000 (P-1 stage 1)
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109
TF factor-bounds graph:
284
270
269
268
267
266
this exponent TF target: 83
TF double-checked to: 67
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Last modified: 2024-03-13T02:15:48+00:00