is 2 143999521 - 1
has 43348176 decimal digits
takes 825.747 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 %14850004529250032.19307.1241 %38.834363.8816 %
Target277212.557463.6364 %90000017000000084.08834.1272 %296.645765.1371 %
Difference-5-205.9162-2.5253 %+585000-124707500-51.8953+2.9970%-257.8115-1.2555 %

Known prime factors (1 factor, 81.9 bits, 0.00005691% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
14399952146521633196705513742290972581.94416153398592452788
22 × 389 × 232513 × 44648521
2019-11-19232513446485213,400.922.05437.777

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2019-11-19timbitManual testing148500045292500622581.94431.274.608%


Trial Factoring results:
575859606162636465666768697071727374757677
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2010-06-18Torchwood InstituteHTPC-V642632640.014
2010-12-22oodairaLinux012642650.026
2012-12-18RichardWEBDM-SOLR2652660.052
2015-02-28Brandonthe_slow_one0072662670.104
2016-04-04dbaughManual testing2672680.208
2016-04-20DerekManual testing2682690.415
2017-02-15JoDuManual testing2692700.830
2017-04-02Choi4KANGManual testing2702711.661
2017-04-15sasakimac2712723.321


ECM factoring results:
No ECM results for M143999521


Lucas-Lehmer results:
No L-L results for M143999521


PRP results:
No PRP results for M143999521


CERT results:
No CERT results for M143999521


P-1 factor-bounds graph:
B1 = 1485000, B2 = 45292500 (P-1 stage 2)
B1 = 1485000 (P-1 stage 1)
104
105
106
107
104
105
106
107
108
TF factor-bounds graph:
272
271
270
269
268
267
266
265
264
this exponent TF target: 77
TF double-checked to: 67
250
260
270
280
290
JSON version of this page
Last modified: 2024-03-13T02:15:48+00:00