is 2 283111867 - 1
has 85225165 decimal digits
takes 3,381.614 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
Actual2700.844058.5714 %1000001000001.73191.4644 %2.576059.1781 %
Target280864.911063.7500 %1700000350000000358.10284.1728 %1,223.013865.2626 %
Difference-10-864.0670-5.1786 %-1600000-349900000-356.3709-2.7084 %-1,220.4378-6.0845 %

Known prime factors (1 factor, 80.1 bits, 0.00002829% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
28311186712912924790920442550822712580.0952280534003705405
3 × 5 × 7 × 31 × 2203 × 8117 × 39181
2019-03-18811739181864.910.16990.2861

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2019-03-18MadPooManual testing10000010000012580.0951.8130.356%


Trial Factoring results:
575859606162636465666768697071727374757677787980
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2011-01-11Rob_Deetwopc2642650.013
2011-07-22Rob_Deetwopc2652660.026
2016-02-22proxy2222Manual testing2662670.053
2017-02-15fraltfralt2672680.106
2018-07-30YxinityManual testing2682690.211
2018-07-30YxinityManual testing2692700.422


ECM factoring results:
No ECM results for M283111867


Lucas-Lehmer results:
No L-L results for M283111867


PRP results:
No PRP results for M283111867


CERT results:
No CERT results for M283111867


P-1 factor-bounds graph:
B1 = 100000 (P-1 stage 1)
102
103
104
105
102
103
104
105
TF factor-bounds graph:
270
269
268
267
266
265
this exponent TF target: 80
TF double-checked to: 67
250
260
270
280
290
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Last modified: 2024-03-13T02:15:48+00:00