is 2 89873389 - 1
has 27054586 decimal digits
takes 302.990 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
Actual276170.283964.4737 %730000147825007.31123.5586 %177.595165.7379 %
Target27585.141064.0000 %60000010000000029.40654.0564 %114.547465.4603 %
Difference+1+85.1430+0.4737 %+130000-85217500-22.0953-0.4978 %+63.0476+0.2776 %

Known prime factors (1 factor, 76.6 bits, 0.00008524% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
898733891151521317357312536545032476.608640635303825759
3 × 11 × 1609 × 1877 × 6428011
2018-12-3118776428011295.571.72073.1975

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2018-12-31Oliver KruseManual testing730000147825001222476.6087.8553.919%


Trial Factoring results:
5758596061626364656667686970717273747576
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2010-11-12Architects Cubedm1_092642650.042
2013-03-24Charles A. Morrischandra2652660.083
2013-04-08SMoffatManual testing2662670.166
2013-07-23Norman LeyManual testing2672680.333
2014-01-28arnaudSRV-4202682690.665
2014-04-04ANONYMOUSSrvrPO12692701.330
2014-11-30JakeWManual testing2702712.661
2017-10-29gcardonaManual testing27127437.25
2018-11-04TheJudgerManual testing274276127.7


ECM factoring results:
No ECM results for M89873389


Lucas-Lehmer results:
No L-L results for M89873389


PRP results:
No PRP results for M89873389


CERT results:
No CERT results for M89873389


P-1 factor-bounds graph:
B1 = 730000, B2 = 14782500 (P-1 stage 2)
B1 = 730000 (P-1 stage 1)
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108
TF factor-bounds graph:
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270
269
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267
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265
this exponent TF target: 75
TF double-checked to: 67
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Last modified: 2024-03-13T02:15:48+00:00