is 2 335428981 - 1
has 100974185 decimal digits
takes 4,989.506 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
Actual2822,920.042264.6341 %1200000012000000258.82502.6841 %3,178.867265.5834 %
Target2811,460.020864.1975 %2000000400000000510.83734.0606 %1,970.858165.6513 %
Difference+1+1,460.0214+0.4366 %+10000000-388000000-252.0123-1.3765 %+1,208.0091-0.0679 %

Known prime factors (1 factor, 96.4 bits, 0.00002874% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
3354289811056212352548053598905423506413096.415157442023852443089720
23 × 5 × 405599 × 1929569 × 5029253
2020-01-261929569502925347,841,98045.26184.701

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2020-01-26Roland ClarksonManual testing120000001200000013096.415300.22.939%


Trial Factoring results:
5758596061626364656667686970717273747576777879808182
 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
2020-01-05Roland ClarksonManual testing2722822,917


ECM factoring results:
No ECM results for M335428981


Lucas-Lehmer results:
No L-L results for M335428981


PRP results:
No PRP results for M335428981


CERT results:
No CERT results for M335428981


P-1 factor-bounds graph:
B1 = 12000000 (P-1 stage 1)
105
106
107
108
105
106
107
108
TF factor-bounds graph:
282
272
271
270
269
266
265
this exponent TF target: 81
TF double-checked to: 67
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270
280
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Last modified: 2024-03-13T02:15:48+00:00