is 2 121447 - 1
has 36560 decimal digits
takes 0.000 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
Actual267244.665774.6269 %10000000020000000000.770511.8918 %245.436377.6442 %
Target2440.000061.3636 %19001700000.00005.8171 %0.000163.6112 %
Difference+23+244.6657+13.2632 %+99998100+1999830000+0.7705+6.0747%+245.4362+14.0330 %

Known prime factors (3 factors, 218.0 bits, 0.17949547% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
12144777726081826.212320
26 × 5
-64647.871e-112.423e-74.931e-7
12144721829122035734337353416472632890.8188987098090415711114073
3 × 2995699363471903704691
2018-11-28329956993634719037046912.991e+96.179e+111.154e+12
121447246881001139153944922549303308131100.96210164145723614166876190820
22 × 32 × 5 × 13 × 541 × 8028931642585088453
2019-02-2054180289316425850884531.496e+121.656e+93.093e+9

4 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2017-02-23kkmrkkblmbrbkManual testing100000000200000000012
skipped known factor: 77726081
---41.137%


Trial Factoring results:
5758596061626364656667
No TF results for M121447


ECM factoring results:
Total ECM effort:12.421 GHz-days
Estimated T-Level:30.612
DigitsB1CompleteFacMiss
201100075.8530.000%
255000011.5510.001%
302500001.32126.688%
3510000000.12288.477%
4030000000.01099.043%


ECM Summary

B1B2factorcurvesGHz-days
5000050000002810.769
250000250000005968.151
2500002500000020.027
2500002500000020.027
1000000100000000633.446


Lucas-Lehmer results:
No L-L results for M121447


PRP results:
dateuseridcompidcofactorsres64
2017-09-21Oliver KruseOliver-PC
77726081
25D9D9727D52311E
2017-09-21Oliver KruseManual testing
77726081
25D9D9727D52311E
2017-09-22Oliver KruseManual testing
77726081
25D9D9727D52311E
2017-11-06kkmrkkblmbrbkc4.xlarge
77726081
25D9D9727D52311E
2018-11-28rucio
77726081
2182912203573433735341647263
C68208178B2D7E07
2018-11-29Oliver KruseGTX-3
77726081
2182912203573433735341647263
C68208178B2D7E07
2019-02-21alexManual testing
77726081
2182912203573433735341647263
2468810011391539449225493033081
C68208178B2D7E07
2019-02-21artorollofourth
77726081
2182912203573433735341647263
2468810011391539449225493033081
C68208178B2D7E07


CERT results:
No CERT results for M121447


P-1 factor-bounds graph:
B1 = 100000000, B2 = 2000000000 (P-1 stage 2)
B1 = 100000000 (P-1 stage 1)
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108
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1010
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1016
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1022
TF factor-bounds graph:
this exponent TF target: 44
TF double-checked to: 67
ECM T-Level=30.61 ~= 85-bit
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Last modified: 2024-03-13T02:15:48+00:00