is 2 72375889 - 1
has 21787314 decimal digits
takes 193.505 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
Actual275105.724664.0000 %620000120900004.82623.5918 %110.550865.2931 %
Target27452.861163.5135 %5000008500000019.78614.1202 %72.647165.0168 %
Difference+1+52.8635+0.4865 %+120000-72910000-14.9598-0.5284 %+37.9037+0.2762 %

Known prime factors (1 factor, 81.7 bits, 0.00011294% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
7237588940473163691039927380364332581.74327960391402611944
23 × 7717 × 523637 × 864917
2015-07-285236378649177,621.92.10214.1314

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2015-07-28Jimmy BrüggemannManual testing62000012090000622581.7435.0893.960%


Trial Factoring results:
57585960616263646566676869707172737475
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2008-09-19Wojciech FlorekManual testing212640.026
2010-05-20ANONYMOUS2642650.052
2010-06-05raymondfserver-232652660.103
2010-06-08raymondfserver-232662670.206
2010-06-13Andre.DemeshinServer2672680.413
2010-06-18Andre.DemeshinServer2682690.826
2012-11-20sikafarmi_rendering_farmManual testing2692701.652
2014-06-04HBendtzManual testing2702713.304
2015-02-21RichD0Manual testing2712726.608
2015-06-28TheJudgerManual testing27227592.51


ECM factoring results:
No ECM results for M72375889


Lucas-Lehmer results:
No L-L results for M72375889


PRP results:
No PRP results for M72375889


CERT results:
No CERT results for M72375889


P-1 factor-bounds graph:
B1 = 620000, B2 = 12090000 (P-1 stage 2)
B1 = 620000 (P-1 stage 1)
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108
TF factor-bounds graph:
275
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271
270
269
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266
265
264
this exponent TF target: 74
TF double-checked to: 67
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Last modified: 2024-03-13T02:15:48+00:00