is 2 143999971 - 1
has 43348311 decimal digits
takes 825.750 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
Actual2726.641261.1111 %1485000148500012.34753.2065 %18.988862.3581 %
Target277212.556763.6364 %90000017000000084.08834.1272 %296.645065.1371 %
Difference-5-205.9155-2.5253 %+585000-168515000-71.7408-0.9206 %-277.6563-2.7791 %

Known prime factors (1 factor, 90.2 bits, 0.00006266% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
14399997114569595097005959458399188632890.2355058888205264277261
43 × 1201 × 30367 × 55817 × 57793
2019-12-0255817577931,741,2750.46500.9445

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2019-12-02timbitManual testing1485000148500012890.23511.991.900%


Trial Factoring results:
575859606162636465666768697071727374757677
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2010-06-18Architects Cubedi4l_12632640.014
2010-12-22laleraa122642650.026
2012-12-18RichardWEBDM-SOLR2652660.052
2015-02-27aurashiftusslcburnin042662670.104
2016-04-04dbaughManual testing2672680.208
2016-04-20DerekManual testing2682690.415
2017-02-15JoDuManual testing2692700.830
2017-04-02Choi4KANGManual testing2702711.661
2017-04-03LasseDemigotester2152712723.321


ECM factoring results:
No ECM results for M143999971


Lucas-Lehmer results:
No L-L results for M143999971


PRP results:
No PRP results for M143999971


CERT results:
No CERT results for M143999971


P-1 factor-bounds graph:
B1 = 1485000 (P-1 stage 1)
103
104
105
106
107
103
104
105
106
107
TF factor-bounds graph:
272
271
270
269
268
267
266
265
264
this exponent TF target: 77
TF double-checked to: 67
250
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Last modified: 2024-03-13T02:15:48+00:00