is 2 2749157 - 1
has 827579 decimal digits
takes 0.212 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
Actual26710.808467.1642 %2880002264238901.41217.4855 %12.220469.6221 %
Target2630.580565.0794 %1400012000000.00881.7090 %0.589465.6761 %
Difference+4+10.2278+2.0848 %+274000+225223890+1.4033+5.7766%+11.6311+3.9460 %

Known prime factors (2 factors, 99.6 bits, 0.00362155% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
274915716494943823.9763
3
-134.068e-131.242e-72.279e-7
2749157567312538381521670085772375.58710317936341604384
25 × 36 × 43 × 73 × 1409 × 100003
2019-05-1114091000035,075.20.00080.0011

1 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2019-05-11JossManual testing3000030000022375.5870.0062.204%
2023-01-27USAFSS6917th_Scty_Sq288000226423890
skipped known factor: 16494943
skipped known factor: 56731253838152167008577
--1.55610.670%


Trial Factoring results:
5758596061626364656667
No TF results for M2749157


ECM factoring results:
Total ECM effort:0.304 GHz-days
Estimated T-Level:0.577
DigitsB1CompleteFacMiss
20110000.11589.102%
25500000.01198.938%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.304


Lucas-Lehmer results:
No L-L results for M2749157


PRP results:
dateuseridcompidcofactorsres64
2017-10-20Oliver KruseGTX-3
16494943
CAE89120C7D014C0
2017-12-05kkmrkkblmbrbkc4.xlarge
16494943
CAE89120C7D014C0
2019-05-12artorollofourth
16494943
56731253838152167008577
CAE89120C7D014C0


CERT results:
No CERT results for M2749157


P-1 factor-bounds graph:
B1 = 288000, B2 = 226423890 (P-1 stage 2)
B1 = 288000 (P-1 stage 1)
B1 = 30000, B2 = 300000 (P-1 stage 2)
B1 = 30000 (P-1 stage 1)
100
101
102
103
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105
106
100
101
102
103
104
105
106
107
108
109
TF factor-bounds graph:
this exponent TF target: 63
TF double-checked to: 67
ECM T-Level=0.58 ~= -15-bit
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JSON version of this page
Last modified: 2024-03-13T02:15:48+00:00