is 2 86386031 - 1
has 26004787 decimal digits
takes 278.235 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
Actual276177.158264.4737 %685000125012506.20573.3937 %183.363965.6793 %
Target27588.578164.0000 %5500009500000026.60103.9520 %115.179165.4227 %
Difference+1+88.5801+0.4737 %+135000-82498750-20.3953-0.5583 %+68.1848+0.2566 %

Known prime factors (1 factor, 89.9 bits, 0.00010406% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
8638603111482261332405086281260424332889.8916645901657644791136
25 × 34 × 7 × 3109 × 127609 × 923249
2018-05-181276099232491,952,6540.79841.2129

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2018-05-18arnaudsnd-15-1526850001250125022889.8916.2063.742%


Trial Factoring results:
5758596061626364656667686970717273747576
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2010-11-21Architects Cubedm1_772642650.043
2010-12-25Michael CManual testing2652660.087
2013-03-13wangyun183Manual testing2662670.173
2013-10-17SMoffatManual testing2672680.346
2013-10-21SMoffatManual testing2682690.692
2013-10-25SMoffatManual testing2692701.384
2014-11-16shaugeManual testing2702712.768
2017-04-18Strolling JellyfishManual testing27127438.75
2018-01-09Brian BeuningManual testing27427544.29
2018-02-04TheJudgerManual testing27527688.58


ECM factoring results:
No ECM results for M86386031


Lucas-Lehmer results:
No L-L results for M86386031


PRP results:
No PRP results for M86386031


CERT results:
No CERT results for M86386031


P-1 factor-bounds graph:
B1 = 685000, B2 = 12501250 (P-1 stage 2)
B1 = 685000 (P-1 stage 1)
104
105
106
104
105
106
107
108
TF factor-bounds graph:
276
275
274
271
270
269
268
267
266
265
this exponent TF target: 75
TF double-checked to: 67
250
260
270
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290
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Last modified: 2024-03-13T02:15:48+00:00