is 2 4854391 - 1
has 1461318 decimal digits
takes 0.673 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
Actual2676.121065.6716%----6.121065.6716%0.0000%
PrimeNet2610.063362.2951%220004500000.00913.2970%0.072463.5382%1.2431%
GPU722651.502964.6154%320007000000.01372.3703%1.516765.4541%0.8387%
Difference+2+4.6181+1.0563%-32000-700000-0.0137-2.3703%+4.6044+0.2175%+0.2175%

Known prime factors (2 factors, 112.1 bits, 0.00230837% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
4854391713257611386411446.0197346520
23 × 32 × 5 × 20407
-9204072.232e-60.00020.0004
4854391757442365731321876492066.0387801620900864
210 × 3 × 7 × 113 × 3210607
2019-07-01102432106075.05750.03540.0657

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
4854391540251532544394214039534551684500934112.057
P-1 results:
No P-1 results for M4854391


Trial Factoring results:
No TF results for M4854391


ECM factoring results:

Old Calculation Method

Total ECM effort:0.418 GHz-days
Estimated T-Level:0.100
DigitsB1CurvesCompleteFacMiss
20110002 / 1000.02098.010%
25500002 / 2800.00799.287%

New Calculation Method

Total ECM effort:0.418 GHz-days
Estimated T-Level:0.100
DigitsB1CompleteFacMiss
20110000.07792.596%
25500000.00799.291%


ECM Summary

B1B2factorcurvesGHz-days
50000500000020.418


Lucas-Lehmer results:
No L-L results for M4854391


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-20T06:33:31kkmrkkblmbrbkManual testing
71325761138641
D08D4232A4ED6B__no
2018-03-30T18:37:41Oliver KruseGTX-5
71325761138641
D08D4232A4ED6B__no
2019-07-03T07:50:35_p95holder_TFL16_PRPt11-E_b
71325761138641
75744236573132187649
38CBDB0A6368DA30no
2019-07-05T06:53:43arnaudstm-11-010
71325761138641
75744236573132187649
38CBDB0A6368DA30no


P-1 factor-bounds graph:
100
101
102
103
104
100
101
102
103
104
105
106
107
TF factor-bounds graph:
267
240
250
260
270
280
290
2100
Last modified: 2019-07-05T06:53:43+00:00