is 2 91127977 - 1
has 27432255 decimal digits
takes 330.086 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
Actual277335.881164.9351 %700000131250007.23203.1364 %343.113166.0348 %
Target27583.968864.0000 %60000011000000034.45684.1363 %118.425665.4891 %
Difference+2+251.9123+0.9351 %+100000-96875000-27.2247-1.0000 %+224.6876+0.5457 %

Known prime factors (1 factor, 80.3 bits, 0.00008811% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
9112797714852089142747819132885292580.2978149028230237032
23 × 32 × 83 × 135403 × 10070869
2019-04-01135403100708694,648.33.55435.3825

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2019-04-01ky0urakuvms370000013125000622580.2977.2323.814%


Trial Factoring results:
575859606162636465666768697071727374757677
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2010-12-26Architects Cubeda3_bu22642650.041
2011-11-01Shadowjd007Manual testing2652660.082
2013-08-29Norman LeyManual testing2662670.164
2014-02-01Juergen KampmeierManual testing2672690.984
2014-02-02Preben SManual testing2692701.312
2014-03-13CSLatDDtmsm7-322702712.624
2017-02-22monstManual testing2712725.248
2018-01-08Tim SorberaManual testing27227431.49
2018-12-09TheJudgerManual testing274276126.0
2019-03-03TheJudgerManual testing276277167.9


ECM factoring results:
No ECM results for M91127977


Lucas-Lehmer results:
No L-L results for M91127977


PRP results:
No PRP results for M91127977


CERT results:
No CERT results for M91127977


P-1 factor-bounds graph:
B1 = 700000, B2 = 13125000 (P-1 stage 2)
B1 = 700000 (P-1 stage 1)
104
105
106
104
105
106
107
108
TF factor-bounds graph:
277
276
274
272
271
270
269
267
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