is 2 2806519 - 1
has 844847 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
Actual26710.587567.1642 %1000000710000000.53917.4676 %11.126669.6162 %
Target2630.568765.0794 %1500013000000.00951.7905 %0.578265.7046 %
Difference+4+10.0188+2.0848 %+985000+69700000+0.5296+5.6771%+10.5484+3.9116 %

Known prime factors (2 factors, 110.5 bits, 0.00393761% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
2806519155578202027031443.8232771729
2771729
-127717294.175e-70.01690.0316
28065191187923889784111059212166.68721163653083840
26 × 5 × 149 × 571 × 777353
2018-05-025717773535.26220.00480.0089

1 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2021-09-14Dylan Delgadolaptop-i78750100000071000000
skipped known factor: 15557820202703
skipped known factor: 118792388978411105921
--0.52510.441%


Trial Factoring results:
5758596061626364656667
No TF results for M2806519


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 M2806519


PRP results:
dateuseridcompidcofactorsres64
2017-10-21Oliver KruseGTX-3
15557820202703
FD5CBD6C3B068D91
2017-12-06kkmrkkblmbrbkc4.xlarge
15557820202703
FD5CBD6C3B068D91
2018-05-04Oliver KruseGTX-4
15557820202703
118792388978411105921
FD5CBD6C3B068D91


CERT results:
No CERT results for M2806519


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=0.77 ~= -14-bit
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260
270
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Last modified: 2024-02-09T03:30:02+00:00