is 2 143688397 - 1
has 43254518 decimal digits
takes 800.265 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
Actual276106.508263.1579 %10000003000000020.83534.4803 %127.343564.8085 %
Target277213.017763.6364 %90000017000000081.66984.1261 %294.687465.1368 %
Difference-1-106.5094-0.4785 %+100000-140000000-60.8345+0.3542%-167.3439-0.3282 %

Known prime factors (1 factor, 76.6 bits, 0.00005333% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1436883971163182403851284268543992476.622404758640271867
3 × 7 × 67 × 20353 × 14134277
2020-05-152035314134277106.516.374311.615

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2020-05-15Franklin WebberManual testing10000003000000022476.62221.824.085%


Trial Factoring results:
575859606162636465666768697071727374757677
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2010-06-18James Hintz41172632640.014
2010-12-22Richard2642650.026
2012-12-16sasaki3mate_ma12652660.052
2015-02-27subgeniusvmlamont2662670.104
2016-03-31dbaughManual testing2672680.208
2016-04-17DerekManual testing2682690.416
2016-11-09roemer2201HPCC2692700.832
2016-11-21Ruediger EckhardManual testing2702711.664
2016-11-21Ruediger EckhardManual testing2712723.328
2016-11-21Ruediger EckhardManual testing2722736.657
2016-11-21Ruediger EckhardManual testing27327413.31
2016-11-21Ruediger EckhardManual testing27427526.63
2020-03-29Franklin WebberManual testing27527653.25


ECM factoring results:
No ECM results for M143688397


Lucas-Lehmer results:
No L-L results for M143688397


PRP results:
No PRP results for M143688397


CERT results:
No CERT results for M143688397


P-1 factor-bounds graph:
B1 = 1000000, B2 = 30000000 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
103
104
105
106
103
104
105
106
107
108
TF factor-bounds graph:
276
275
274
273
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