is 2 83598587 - 1
has 25165683 decimal digits
takes 260.868 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
Actual276183.065264.4737 %690000134550006.26893.4351 %189.334165.6940 %
Target27591.531664.0000 %5500009500000025.77233.9361 %117.303865.4170 %
Difference+1+91.5337+0.4737 %+140000-81545000-19.5034-0.5010 %+72.0303+0.2771 %

Known prime factors (1 factor, 77.3 bits, 0.00009252% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
835985871919186925351820551729592477.3451147858471191517
8219 × 56333 × 2479171
2017-11-02563332479171592.550.85221.1415

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2017-11-02HardyP Germanyws-HP-Z800_3.6GHz6900001345500022477.3456.2693.786%


Trial Factoring results:
5758596061626364656667686970717273747576
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2010-12-21Architects Cubeda3_bu22642650.045
2012-08-19Carsten KossendeyManual testing2652660.089
2013-02-16Sergey NosovManual testing2662680.536
2013-02-18saffaManual testing2682690.715
2013-02-19DavinManual testing2692714.291
2017-01-011997rj7Manual testing27127317.16
2017-01-22Brian BeuningManual testing27327568.65
2017-03-10ANONYMOUSManual testing27527691.53


ECM factoring results:
No ECM results for M83598587


Lucas-Lehmer results:
No L-L results for M83598587


PRP results:
No PRP results for M83598587


CERT results:
No CERT results for M83598587


P-1 factor-bounds graph:
B1 = 690000, B2 = 13455000 (P-1 stage 2)
B1 = 690000 (P-1 stage 1)
103
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105
106
103
104
105
106
107
108
TF factor-bounds graph:
276
275
273
271
269
268
266
265
this exponent TF target: 75
TF double-checked to: 67
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Last modified: 2024-03-13T02:15:48+00:00