is 2 2808107 - 1
has 845325 decimal digits
takes 0.217 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
Actual26710.581567.1642%2880002264238901.41217.5037%11.993569.6281%
Target2630.568465.0794%150002600000.00321.7907%0.571565.7047%
Difference+4+10.0131+2.0848%+273000+226163890+1.4089+5.7130%+11.4220+3.9234%

Known prime factors (3 factors, 202.6 bits, 0.00721549% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
280810712493197784162871650.150222448749
3 × 1132 × 5807
-12769127695.768e-50.00140.0029
28081072281315023453190207432167.62840620158410153
72 × 4243 × 195376579
2022-08-21424319537657911.8561.19262.2265
2808107346295666572338011034474492684.8406165998421220024932
22 × 3 × 743 × 15901 × 111791 × 389047
2022-08-211117913890471,815,5700.01420.0255

4 Composite Factors:
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2022-08-21harleei5-5250U_160028800022642389046152.4691.4120.4342.8247.504%


Trial Factoring results:
No TF results for M2808107


ECM factoring results:
Total ECM effort:0.313 GHz-days
Estimated T-Level:0.577
DigitsB1CompleteFacMiss
20110000.11589.102%
25500000.01198.938%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.313


Lucas-Lehmer results:
No L-L results for M2808107


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-21alpertronlaptop2
1249319778416287
A1C54B554D07C0__no
2017-11-16Oliver KruseGTX-1
1249319778416287
A1C54B554D07C0__no
2022-08-21LordJuliusWhiteBox
1249319778416287
228131502345319020743
34629566657233801103447449
A1C54B554D07C0FFno


P-1 factor-bounds graph:
B1 = 288000, B2 = 226423890 (P-1 stage 2)
B1 = 288000 (P-1 stage 1)
102
103
104
105
106
102
103
104
105
106
107
108
109
TF factor-bounds graph:
this exponent TF target: 63
TF double-checked to: 67.7
ECM T-Level=0.58 ~= -15-bit
250
260
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280
290
Last modified: 2023-03-25T13:08:14+00:00