is 2 72541463 - 1
has 21837157 decimal digits
takes 193.948 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-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual27452.740463.5135 %6650006650002.57801.7306 %55.318464.1450 %
Target27452.740463.5135 %5000008500000019.78614.1213 %72.526565.0172 %
Difference---+165000-84335000-17.2080-2.3907 %-17.2080-0.8723 %

Known prime factors (1 factor, 100.4 bits, 0.00013839% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
72541463166107360354510310600784958259331100.39011449132226249028820992
213 × 32 × 7 × 127 × 773 × 424117 × 532811
2014-08-104241175328111.818e+91.66713.3462

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2014-08-10TheJudgerManual testing665000665000131100.3903.2711.731%


Trial Factoring results:
575859606162636465666768697071727374
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2002-05-18Jossv4_computers212570.000
2008-09-19Wojciech FlorekManual testing212640.026
2010-07-19GrunwalderGIMPcompute-0-12642650.052
2010-09-18C-GEOTC-GEOT2652660.103
2010-09-19GrunwalderGIMPcompute-0-42662680.618
2011-01-23searchingforprimesSuperP6T72682690.824
2012-10-05SMoffatManual testing2692701.648
2014-07-01Mark RoseManual testing2702713.296
2014-07-14ktonyManual testing27127446.15


ECM factoring results:
No ECM results for M72541463


Lucas-Lehmer results:
No L-L results for M72541463


PRP results:
No PRP results for M72541463


CERT results:
No CERT results for M72541463


P-1 factor-bounds graph:
B1 = 665000 (P-1 stage 1)
104
105
106
104
105
106
TF factor-bounds graph:
274
271
270
269
268
266
265
264
257
this exponent TF target: 74
TF double-checked to: 67
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260
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2110
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Last modified: 2024-03-13T02:15:48+00:00