is 2 88389331 - 1
has 26607840 decimal digits
takes 297.987 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
Actual276173.143064.4737 %700000119000006.40483.3774 %179.547865.6735 %
Target27586.570564.0000 %60000010000000029.40654.0482 %115.977065.4573 %
Difference+1+86.5725+0.4737 %+100000-88100000-23.0017-0.6708 %+63.5708+0.2162 %

Known prime factors (1 factor, 89.3 bits, 0.00010100% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
883893317486036933133632583687411692789.2744234694871224691464
23 × 17 × 37 × 263 × 408137 × 7840067
2018-08-1740813778400672,758,2123.97454.0604

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2018-08-17volki7000001190000022789.2746.4053.724%


Trial Factoring results:
5758596061626364656667686970717273747576
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2010-11-14Architects Cubedm1_332642650.042
2011-03-16wavelet3000Manual testing2652660.085
2011-04-12wavelet3000Manual testing2662670.169
2011-04-20wavelet3000Manual testing2672680.338
2011-11-24wavelet3000Manual testing2682702.029
2013-07-01jonthomsonphenom2702712.705
2014-01-23Ryan PropperManual testing2712725.411
2017-07-14GregManual testing27227310.82
2017-07-25Brian BeuningManual testing27327421.64
2018-07-28LaurVManual testing27427543.29
2018-08-02tServoManual testing27527686.57


ECM factoring results:
No ECM results for M88389331


Lucas-Lehmer results:
No L-L results for M88389331


PRP results:
No PRP results for M88389331


CERT results:
No CERT results for M88389331


P-1 factor-bounds graph:
B1 = 700000, B2 = 11900000 (P-1 stage 2)
B1 = 700000 (P-1 stage 1)
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108
TF factor-bounds graph:
276
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273
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268
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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