is 2 2803061 - 1
has 843806 decimal digits
takes 0.216 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
Actual26710.600567.1642 %1000000710000000.53917.4666 %11.139669.6159 %
Target2630.569465.0794 %1500013000000.00951.7901 %0.578965.7045 %
Difference+4+10.0311+2.0848 %+985000+69700000+0.5296+5.6765%+10.5607+3.9114 %

Known prime factors (3 factors, 146.3 bits, 0.00521891% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
2803061384355724331135.1626856
23 × 857
-88572.423e-96.076e-69.782e-6
2803061112950968770391443.3612014779
3 × 13 × 19 × 2719
2008-09-301927194.596e-71.860e-53.099e-5
28030612511084000043593388072167.76744791818659023
4259 × 6301 × 1669097
2021-09-106301166909720.6710.01090.0190

4 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2021-09-10Dylan Delgadolaptop-i7875010000007100000022167.7670.52510.440%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2008-09-30markrManual testing??
43.361
14


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 M2803061


PRP results:
dateuseridcompidcofactorsres64
2017-10-21Oliver KruseGTX-3
38435572433
11295096877039
315E0C2F34C83D33
2017-12-06kkmrkkblmbrbkc4.xlarge
38435572433
11295096877039
315E0C2F34C83D33
2021-09-12LuminescenceMain
38435572433
11295096877039
251108400004359338807
315E0C2F34C83D33


CERT results:
dateuseridcompid
2021-09-12curtiscwcm202--11l


P-1 factor-bounds graph:
B1 = 1000000, B2 = 71000000 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
100
101
102
103
104
105
106
100
101
102
103
104
105
106
107
108
TF factor-bounds graph:
this exponent TF target: 63
TF double-checked to: 67
ECM T-Level=0.58 ~= -15-bit
250
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270
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Last modified: 2024-03-13T02:15:48+00:00