is 2 4900289 - 1
has 1475134 decimal digits
takes 0.679 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
Actual2676.063765.6716 %23500002138500002.78839.9617 %8.852069.0913 %
Target2651.488864.6154 %3200035000000.04442.3740 %1.533265.4554 %
Difference+2+4.5749+1.0563 %+2318000+210350000+2.7439+7.5876%+7.3188+3.6359 %

Known prime factors (3 factors, 233.0 bits, 0.00475545% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
4900289375852166311135.1293835
5 × 13 × 59
-13591.709e-93.117e-65.318e-6
49002892982842445024586282149684254873097.91330435372740511695148487
612 × 42139 × 964351 × 201279523
2021-09-249643512012795231.090e+102.38734.1166
490028912579099289998885429652146091273199.989128350585955225145186867
3 × 23 × 37 × 109 × 21859 × 1742497 × 12109277
2021-09-241742497121092773.002e+100.46370.7128

4 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2021-09-24Dylan Delgadolaptop-ryzen737002350000213850000260197.9012.78811.581%


Trial Factoring results:
5758596061626364656667
No TF results for M4900289


ECM factoring results:
Total ECM effort:0.629 GHz-days
Estimated T-Level:0.577
DigitsB1CompleteFacMiss
20110000.11589.102%
25500000.01198.938%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.629


Lucas-Lehmer results:
No L-L results for M4900289


PRP results:
dateuseridcompidcofactorsres64
2017-09-20kkmrkkblmbrbkManual testing
37585216631
104284563E1470A2
2018-04-05treborLaptop
37585216631
104284563E1470A2
2021-09-24mikrNitron
37585216631
298284244502458628214968425487
1257909928999888542965214609127
F7846AC45D428987


CERT results:
dateuseridcompid
2021-09-24khyu66


P-1 factor-bounds graph:
B1 = 2350000, B2 = 213850000 (P-1 stage 2)
B1 = 2350000 (P-1 stage 1)
100
101
102
103
104
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106
107
100
101
102
103
104
105
106
107
108
109
TF factor-bounds graph:
this exponent TF target: 65
TF double-checked to: 67
ECM T-Level=0.58 ~= -15-bit
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2100
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Last modified: 2024-03-13T02:15:48+00:00