is 2 89282807 - 1
has 26876804 decimal digits
takes 300.999 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
Actual276171.410364.4737 %7850007850003.83741.5238 %175.247765.0150 %
Target27585.704264.0000 %60000010000000029.40654.0532 %115.110665.4591 %
Difference+1+85.7061+0.4737 %+185000-99215000-25.5691-2.5293 %+60.1371-0.4441 %

Known prime factors (1 factor, 79.5 bits, 0.00008904% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
892828078514481731821515822540812479.4944768265032158720
29 × 3 × 5 × 881 × 20981 × 33589
2019-01-2420981335892,404.20.10590.2087

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2019-01-24penluManual testing7850007850001212479.4944.1781.708%
2019-02-04treborManual testing72500072500012479.4943.8081.651%


Trial Factoring results:
5758596061626364656667686970717273747576
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2010-11-09Architects Cubedm1_712642650.042
2013-03-19Le ComteManual testing2652702.595
2013-09-22SMoffatManual testing2702712.678
2017-07-11monstManual testing2712725.357
2017-09-051997rj7Manual testing27227310.71
2017-09-08Brian BeuningManual testing27327421.43
2018-10-07TheJudgerManual testing274276128.6


ECM factoring results:
No ECM results for M89282807


Lucas-Lehmer results:
No L-L results for M89282807


PRP results:
No PRP results for M89282807


CERT results:
No CERT results for M89282807


P-1 factor-bounds graph:
B1 = 785000 (P-1 stage 1)
B1 = 725000 (P-1 stage 1)
103
104
105
106
103
104
105
106
TF factor-bounds graph:
276
274
273
272
271
270
265
this exponent TF target: 75
TF double-checked to: 67
250
260
270
280
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Last modified: 2024-03-13T02:15:48+00:00