is 2 335428073 - 1
has 100973912 decimal digits
takes 4,989.493 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
Actual28411,680.201965.4762 %1200000012000000258.82502.2336 %11,939.026966.2473 %
Target2811,460.024864.1975 %2000000400000000510.83734.0606 %1,970.862065.6513 %
Difference+3+10,220.1771+1.2787 %+10000000-388000000-252.0123-1.8270 %+9,968.1649+0.5960 %

Known prime factors (1 factor, 93.4 bits, 0.00002784% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
335428073128843669084180169299768095992993.38019205856553959359463
3 × 739 × 5227 × 433607 × 3822251
2019-12-1943360738222515,980,26413.33419.034

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2019-12-19Roland ClarksonManual testing120000001200000012993.380300.22.939%


Trial Factoring results:
57585960616263646566676869707172737475767778798081828384
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2010-04-21Architects CubedManual testing2642650.011
2013-07-19LaurVManual testing2652660.022
2015-05-29Jacques MOLNEManual testing2662690.312
2016-04-01Jacques MOLNEManual testing2692700.356
2016-04-01Jacques MOLNEManual testing2702710.713
2016-04-01Jacques MOLNEManual testing2712721.426
2019-12-18Roland ClarksonManual testing27228411,677


ECM factoring results:
No ECM results for M335428073


Lucas-Lehmer results:
No L-L results for M335428073


PRP results:
No PRP results for M335428073


CERT results:
No CERT results for M335428073


P-1 factor-bounds graph:
B1 = 12000000 (P-1 stage 1)
104
105
106
107
108
104
105
106
107
108
TF factor-bounds graph:
284
272
271
270
269
266
265
this exponent TF target: 81
TF double-checked to: 67
250
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Last modified: 2024-03-13T02:15:48+00:00