is 2 4898821 - 1
has 1474693 decimal digits
takes 0.679 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
-unknown- primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2676.065565.6716%----6.065565.6716%0.0000%
PrimeNet2610.062762.2951%220004500000.00913.3020%0.071863.5401%1.2450%
GPU722651.489364.6154%320007000000.01372.3739%1.503065.4554%0.8400%
Difference+2+4.5762+1.0563%-32000-700000-0.0137-2.3739%+4.5625+0.2163%+0.2163%

Known prime factors (2 factors, 77.3 bits, 0.00157849% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
4898821369958961931135.1073776
26 × 59
-64641.698e-91.286e-52.618e-5
489882151257343887211342.221523160
23 × 5 × 11 × 29 × 41
2008-09-3029411.481e-75.960e-61.186e-5

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
48988211896311373580124260391532477.328
P-1 results:
No P-1 results for M4898821


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2008-09-30T21:36:00markrManual testing??42.221132.84762e-81.4426.04918e-8


ECM factoring results:

Old Calculation Method

Total ECM effort:0.629 GHz-days
Estimated T-Level:0.150
DigitsB1CurvesCompleteFacMiss
20110003 / 1000.03097.030%
25500003 / 2800.01198.932%

New Calculation Method

Total ECM effort:0.629 GHz-days
Estimated T-Level:0.150
DigitsB1CompleteFacMiss
20110000.11589.102%
25500000.01198.938%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.629


Lucas-Lehmer results:
No L-L results for M4898821


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-20T06:45:19kkmrkkblmbrbkManual testing
36995896193
5125734388721
73212769722884__no
2018-04-05T19:45:39krackerGRID-11
36995896193
5125734388721
73212769722884__no


P-1 factor-bounds graph:
100
101
102
100
101
102
TF factor-bounds graph:
267
2
230
240
250
260
270
280
290
2100
Last modified: 2019-07-27T00:39:51+00:00