is 2 89143981 - 1
has 26835013 decimal digits
takes 300.531 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
Actual276171.677364.4737 %725000143187507.16453.5289 %178.841865.7274 %
Target27585.837664.0000 %60000010000000029.40654.0524 %115.244165.4589 %
Difference+1+85.8396+0.4737 %+125000-85681250-22.2419-0.5235 %+63.5977+0.2685 %

Known prime factors (1 factor, 79.1 bits, 0.00008868% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
891439816286734860952218931097372479.0573526169007951428
22 × 17 × 71 × 313 × 541 × 4313147
2018-10-2054143131471,554.21.15122.1455

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2018-10-20Oliver KruseHalfPM1-0725000143187501222479.0577.1653.887%


Trial Factoring results:
5758596061626364656667686970717273747576
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2010-11-07Architects Cubedm1_102642650.042
2013-06-22David CampeauManual testing2652660.084
2014-01-31SMoffatManual testing2662670.168
2014-02-02SMoffatManual testing2672680.335
2014-04-05SMoffatManual testing2682690.671
2014-04-05hkskypManual testing2692701.341
2014-09-14Meral HarbesManual testing2702712.682
2017-06-22monstManual testing2712725.365
2017-08-20ANONYMOUSManual testing27227432.19
2018-09-24William F. Garnett IIIManual testing274276128.8


ECM factoring results:
No ECM results for M89143981


Lucas-Lehmer results:
No L-L results for M89143981


PRP results:
No PRP results for M89143981


CERT results:
No CERT results for M89143981


P-1 factor-bounds graph:
B1 = 725000, B2 = 14318750 (P-1 stage 2)
B1 = 725000 (P-1 stage 1)
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TF factor-bounds graph:
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this exponent TF target: 75
TF double-checked to: 67
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Last modified: 2024-03-13T02:15:48+00:00