is 2 86195171 - 1
has 25947332 decimal digits
takes 277.620 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
Actual276177.550564.4737 %7000007000003.26911.4414 %180.819664.9858 %
Target27588.774264.0000 %5500009500000026.60103.9509 %115.375265.4223 %
Difference+1+88.7763+0.4737 %+150000-94300000-23.3319-2.5095 %+65.4444-0.4366 %

Known prime factors (1 factor, 88.6 bits, 0.00010275% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
861951714587994794398815409437242412788.5682661398974658809720
23 × 5 × 29 × 163 × 373 × 85703 × 440311
2018-02-23857034403111,083,0120.49050.8146

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2018-02-23treborDesktop70000070000012788.5683.2691.618%


Trial Factoring results:
5758596061626364656667686970717273747576
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2010-11-20Architects Cubedm1_032642650.043
2011-03-05Michael CManual testing2652660.087
2013-08-17RobishManual testing2662670.173
2013-10-16S04803Manual testing2672680.347
2013-10-17S04803Manual testing2682690.694
2013-10-21PEDManual testing2692701.387
2014-11-19Houd Al-Obaidlihpi72702712.774
2017-04-01Strolling JellyfishManual testing27127438.84
2017-12-17Brian BeuningManual testing27427544.39
2018-01-28TheJudgerManual testing27527688.78


ECM factoring results:
No ECM results for M86195171


Lucas-Lehmer results:
No L-L results for M86195171


PRP results:
No PRP results for M86195171


CERT results:
No CERT results for M86195171


P-1 factor-bounds graph:
B1 = 700000 (P-1 stage 1)
103
104
105
106
103
104
105
106
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
280
290
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Last modified: 2024-03-13T02:15:48+00:00