is 2 81186661 - 1
has 24439621 decimal digits
takes 253.342 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
Actual27594.250864.0000 %685000137000006.30793.7834 %100.558765.3620 %
Target27594.250864.0000 %5500009000000024.53973.8818 %118.790565.3974 %
Difference---+135000-76300000-18.2318-0.0984 %-18.2318-0.0354 %

Known prime factors (1 factor, 89.5 bits, 0.00011028% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
811866618978319928226496868136445612789.5375529430461628725480
23 × 32 × 5 × 421 × 443 × 77383 × 1064257
2017-08-017738310642572,928,0410.59340.7126

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2017-08-01Architects Cubeda3_sc68500013700000622789.5376.3083.783%


Trial Factoring results:
57585960616263646566676869707172737475
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2010-12-12Architects Cubedm1_352642650.046
2011-02-15Giselhereragon2652660.092
2011-02-18Thomas NManual testing2662670.184
2011-02-23lindedLKMHDC2-wilmon2672680.368
2011-03-01Cloudy WaterACER2682690.736
2011-03-05tmorrowteapot2692701.473
2013-11-02SMoffatManual testing2702712.945
2014-01-23rlakeManual testing2712725.891
2016-10-05gcardonaManual testing27227311.78
2016-11-18ANONYMOUSManual testing27327570.69


ECM factoring results:
No ECM results for M81186661


Lucas-Lehmer results:
No L-L results for M81186661


PRP results:
No PRP results for M81186661


CERT results:
No CERT results for M81186661


P-1 factor-bounds graph:
B1 = 685000, B2 = 13700000 (P-1 stage 2)
B1 = 685000 (P-1 stage 1)
103
104
105
106
103
104
105
106
107
108
TF factor-bounds graph:
275
273
272
271
270
269
268
267
266
265
this exponent TF target: 75
TF double-checked to: 67
250
260
270
280
290
JSON version of this page
Last modified: 2024-03-13T02:15:48+00:00