is 2 147836383 - 1
has 44503186 decimal digits
takes 847.749 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 PRP tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP3C03E74B8C0F4B16PRP-tested

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual27312.938961.6438 %400000012000000085.80928.2556 %98.748164.8104 %
Target277207.040863.6364 %90000017000000084.08834.1400 %291.129165.1418 %
Difference-4-194.1019-1.9925 %+3100000-50000000+1.7209+4.1156%-192.3810-0.3314 %

Known prime factors (1 factor, 83.7 bits, 0.00005661% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
147836383156525724703354195170504332683.69552938837357565152
25 × 3 × 7 × 793181 × 99319111
2020-07-177931819931911113,25151.22984.035

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2020-07-17Roland ClarksonManual testing400000012000000022683.69587.295.999%


Trial Factoring results:
575859606162636465666768697071727374757677
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2011-01-04Torchwood InstituteCCI_PH2_9552642650.025
2013-01-02tscc022652660.051
2015-03-10Schultz7676Delta_Home_Computer2662670.101
2016-03-17DerekManual testing2672680.202
2016-06-04DerekManual testing2682690.404
2016-06-08bastrogueManual testing2692700.809
2016-06-28bastrogueManual testing2702711.618
2016-09-10bastrogueManual testing2712723.235
2016-10-03John BurroughsManual testing2722736.470


ECM factoring results:
No ECM results for M147836383


Lucas-Lehmer results:
No L-L results for M147836383


PRP results:
dateuseridcompidcofactorsres64
2019-10-26Roland ClarksonManual testing3C03E74B8C0F4B16


CERT results:
No CERT results for M147836383


P-1 factor-bounds graph:
B1 = 4000000, B2 = 120000000 (P-1 stage 2)
B1 = 4000000 (P-1 stage 1)
104
105
106
107
104
105
106
107
108
109
TF factor-bounds graph:
273
272
271
270
269
268
267
266
265
this exponent TF target: 77
TF double-checked to: 67
250
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Last modified: 2024-03-13T02:15:48+00:00