is 2 143021377 - 1
has 43053725 decimal digits
takes 796.550 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
Actual277214.011163.6364 %5580001989500013.01423.4977 %227.025464.9083 %
Target277214.011163.6364 %90000017000000081.66984.1238 %295.680965.1359 %
Difference----342000-150105000-68.6555-0.6261 %-68.6555-0.2277 %

Known prime factors (1 factor, 82.8 bits, 0.00005790% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
14302137784397423635134835972275992582.80329505177969002087
11 × 47 × 571 × 27031 × 3697511
2020-09-202703136975116,848.41.83333.0385

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2020-09-20KrieselManual testing5580001989500022582.80313.013.498%


Trial Factoring results:
575859606162636465666768697071727374757677
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2010-06-17Corranrri72632640.014
2010-12-22Richardsvn_022642650.026
2012-12-12KayJongsmaHenk2652660.052
2015-02-25Grant McCrackenLauren-Laptop2662670.104
2016-03-31dbaughManual testing2672680.209
2016-04-10vbBDManual testing2682690.418
2016-04-15SourceBinary.comManual testing2692700.836
2016-04-19SourceBinary.comManual testing2702711.672
2016-04-24SourceBinary.comManual testing2712723.344
2020-09-20KrieselManual testing2722736.688
2020-09-20KrieselManual testing27327413.38
2020-09-20KrieselManual testing27427526.75
2020-09-20KrieselManual testing27527653.50
2020-09-20KrieselManual testing276277107.0


ECM factoring results:
No ECM results for M143021377


Lucas-Lehmer results:
No L-L results for M143021377


PRP results:
No PRP results for M143021377


CERT results:
No CERT results for M143021377


P-1 factor-bounds graph:
B1 = 558000, B2 = 19895000 (P-1 stage 2)
B1 = 558000 (P-1 stage 1)
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106
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104
105
106
107
108
TF factor-bounds graph:
277
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275
274
273
272
271
270
269
268
267
266
265
264
this exponent TF target: 77
TF double-checked to: 67
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Last modified: 2024-03-13T02:15:48+00:00