is 2 2812801 - 1
has 846738 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
Actual26710.563867.1642 %1000000710000000.53917.4694 %11.102969.6168 %
Target2630.567465.0794 %1500013000000.00951.7913 %0.576965.7049 %
Difference+4+9.9964+2.0848 %+985000+69700000+0.5296+5.6781%+10.5260+3.9119 %

Known prime factors (2 factors, 91.6 bits, 0.00325631% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
281280161881623825.88311
11
-1111.589e-121.730e-72.279e-7
2812801603721317317964321832065.71110731674891291
10731674891291
2018-05-031107316748912912.593765,481122,300

1 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2021-09-16Dylan Delgadolaptop-i78750100000071000000
skipped known factor: 61881623
--0.52510.444%


Trial Factoring results:
5758596061626364656667
No TF results for M2812801


ECM factoring results:
Total ECM effort:0.414 GHz-days
Estimated T-Level:0.769
DigitsB1CompleteFacMiss
20110000.15485.740%
25500000.01498.587%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.313
50000500000010.102


Lucas-Lehmer results:
No L-L results for M2812801


PRP results:
dateuseridcompidcofactorsres64
2017-10-21Oliver KruseGTX-0
61881623
2FE99623EF4C1D7C
2017-12-06kkmrkkblmbrbkc4.xlarge
61881623
2FE99623EF4C1D7C
2018-05-03_p95holder_TFL16_PRPt11-E_b
61881623
60372131731796432183
2FE99623EF4C1D7C


CERT results:
No CERT results for M2812801


P-1 factor-bounds graph:
B1 = 1000000, B2 = 71000000 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
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100
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1010
1011
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TF factor-bounds graph:
this exponent TF target: 63
TF double-checked to: 67
ECM T-Level=0.77 ~= -14-bit
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Last modified: 2024-03-03T02:29:32+00:00