is 2 81187973 - 1
has 24440016 decimal digits
takes 253.346 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
Actual27594.249364.0000 %----94.249364.0000 %
Target27594.249364.0000 %5500009000000024.53973.8818 %118.788965.3974 %
Difference----550000-90000000-24.5397-3.8818 %-24.5397-1.3974 %

Known prime factors (1 factor, 103.4 bits, 0.00012732% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
811879731311611538957987575911468113448132103.37180776221556731535587880
23 × 5 × 37 × 1447 × 15299 × 242551 × 10164527
2017-08-08242551101645271.722e+93.54344.6800

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2017-08-08Architects Cubedgpu7232103.3716.6280.000%


Trial Factoring results:
57585960616263646566676869707172737475
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2010-12-12Architects Cubedm1_252642650.046
2011-02-14kagakubuhuminori2652660.092
2013-01-26Bold_SeekerManual testing2662670.184
2014-04-07g0bManual testing2672680.368
2014-04-08g0bManual testing2682690.736
2014-04-09g0bManual testing2692701.473
2014-08-08SMoffatManual testing2702712.945
2016-09-23ANONYMOUSManual testing27127588.36


ECM factoring results:
No ECM results for M81187973


Lucas-Lehmer results:
No L-L results for M81187973


PRP results:
No PRP results for M81187973


CERT results:
No CERT results for M81187973


P-1 factor-bounds graph:
104
105
106
104
105
106
107
108
TF factor-bounds graph:
275
271
270
269
268
267
266
265
this exponent TF target: 75
TF double-checked to: 67
250
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270
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2110
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Last modified: 2024-03-13T02:15:48+00:00