is 2 1051 - 1
has 317 decimal digits
takes 0.000 GHz-days to do one PRP test
Has been fully factored.
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-
Cofactor is a certified prime

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actualunknown----0.00000.0000%
Target2440.002275.0000%500500000.00000.6157%0.002275.1539%
Difference-44-0.0022-75.0000%-500-500000.0000-0.6157%-0.0022-75.1539%

Known prime factors (4 factors, 1,051.0 bits, 100.00000000% known):
Remaining cofactor is a certified-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
10513575503721.7701701
35 × 7
-2432433.637e-104.649e-99.462e-9
105121573801281844182793233754303617414455827438530123
4576636299249
63207.06910263463978041951852156876452719987847681940309288
0388504424

23 × 7 × 3761 × 487306946197912402294074355828616432164789964166446939
2010-08-0837614873069461979124022940743558286164321647899641664469391.307e+145.079e+419.487e+41
105130501790606325684292149480855801973385632629941253
4951989303214657199
69227.50014510842343637337912535433328164592476514096071005
4686959706572149

3 × 13 × 89 × 22291 × 17590259 × 1459596053 × 953995682251 × 76569733338655747012082020517
2013-08-09953995682251765697333386557470120820205171.667e+147.981e+161.491e+17
1051
click to show decimal representation
180594.6612013-08-09

4 Composite Factors:
P-1 results:
No P-1 results for M1051


Trial Factoring results:
No TF results for M1051


ECM factoring results:
Total ECM effort:21.545 GHz-days
Estimated T-Level:42.064
DigitsB1CompleteFacMiss
2011000150.5000.000%
255000060.2000.000%
3025000021.5000.000%
3510000006.6890.124%
4030000001.76017.200%
45110000000.41366.173%
50440000000.08791.654%
551100000000.01798.342%
602600000000.00399.706%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
10.00000e+0
2600000002600000000030121.55


Lucas-Lehmer results:
No L-L results for M1051


PRP results:
No PRP results for M1051


P-1 factor-bounds graph:
101
102
103
104
105
106
107
108
109
1010
1011
1012
101
102
103
104
105
106
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109
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1016
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1021
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1024
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1038
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1051
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1054
TF factor-bounds graph:
this exponent TF target: 44
TF double-checked to: 67.9
ECM T-Level=42.06 ~= 123-bit
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2110
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Last modified: 2023-10-02T12:12:48+00:00