is 2 86628019 - 1
has 26077633 decimal digits
takes 279.014 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
Actual276176.663364.4737 %7000007000003.26911.4425 %179.932564.9861 %
Target27588.330664.0000 %5500009500000026.60103.9534 %114.931765.4232 %
Difference+1+88.3327+0.4737 %+150000-94300000-23.3319-2.5109 %+65.0008-0.4371 %

Known prime factors (1 factor, 114.0 bits, 0.00013158% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
866280192056060702995632339162615175938652135113.985118671806577709709554977540
22 × 32 × 5 × 37 × 79 × 113 × 3187 × 13151 × 96181 × 495151
2018-04-03961814951512.079e+90.55070.9142

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2018-04-03mgpainter4ghz_quad_core700000700000135113.9853.2691.619%


Trial Factoring results:
5758596061626364656667686970717273747576
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2010-10-24Michael CManual testing2642650.043
2010-11-29Michael CManual testing2652670.259
2013-03-01saffaManual testing2672680.345
2013-03-15ANONYMOUS2682690.690
2013-05-22Brian V.Manual testing2692701.380
2013-11-16SMoffatManual testing2702712.760
2017-04-13Judge HaleManual testing27127316.56
2017-06-14RichD0Manual testing27327422.08
2018-02-16Brian BeuningManual testing27427544.17
2018-02-18TheJudgerManual testing27527688.33


ECM factoring results:
No ECM results for M86628019


Lucas-Lehmer results:
No L-L results for M86628019


PRP results:
No PRP results for M86628019


CERT results:
No CERT results for M86628019


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
273
271
270
269
268
267
265
this exponent TF target: 75
TF double-checked to: 67
250
260
270
280
290
2100
2110
2120
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Last modified: 2024-03-13T02:15:48+00:00