is 2 1368397 - 1
has 411929 decimal digits
takes 0.052 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L4A35529C973EB7B3double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26721.714468.6567 %31069001118490000.50008.2129 %22.214471.2309 %
Target2600.112265.0000 %55002750000.00111.1042 %0.113465.3865 %
Difference+7+21.6022+3.6567 %+3101400+111574000+0.4989+7.1086%+22.1010+5.8444 %

Known prime factors (1 factor, 75.4 bits, 0.00551218% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1368397508442164556028134440092375.42918578021018608932
22 × 3 × 11777 × 131456943043
2015-02-10117771314569430435,591.9396.51740.57

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2003-09-21Xyzzyv4_computers15000225000--0.0012.318%
2003-09-21Team Prime Ribv4_computers15000225000--0.0012.318%
2014-04-15ANONYMOUSManual testing145000145000--0.0092.614%
2014-04-20JossManual testing200000200000--0.0132.992%
2014-08-29mikrMSI310690011184900012--0.50013.924%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2001-11-03ANONYMOUSv4_computers212570.014
2003-06-30ANONYMOUSv4_computers212580.028
2022-03-07LordJuliusManual testing258260
2009-02-19Sturle Sundebruch.ifi2602610.112
2011-05-09XyzzyManual testing2612620.224
2013-01-23dbaughManual testing2622630.717


ECM factoring results:
Total ECM effort:29.213 GHz-days
Estimated T-Level:25.704
DigitsB1CompleteFacMiss
201100014.6540.000%
25500001.65119.189%
302500000.14186.866%
3510000000.01099.021%


ECM Summary

B1B2factorcurvesGHz-days
50000500000024913.33
50000500000020.094
250000350000005015.79


Lucas-Lehmer results:
No L-L results for M1368397


PRP results:
dateuseridcompidcofactorsres64
2017-09-30Oliver KruseGTX-2
50844216455602813444009
6993842E47D5C332
2017-10-25kkmrkkblmbrbkc4.xlarge
50844216455602813444009
6993842E47D5C332


CERT results:
No CERT results for M1368397


P-1 factor-bounds graph:
B1 = 3106900, B2 = 111849000 (P-1 stage 2)
B1 = 3106900 (P-1 stage 1)
B1 = 200000 (P-1 stage 1)
B1 = 145000 (P-1 stage 1)
B1 = 15000, B2 = 225000 (P-1 stage 2)
B1 = 15000 (P-1 stage 1)
103
104
105
106
107
103
104
105
106
107
108
109
1010
1011
1012
TF factor-bounds graph:
263
262
261
260
258
257
this exponent TF target: 60
TF double-checked to: 67
ECM T-Level=25.7 ~= 69-bit
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Last modified: 2024-02-09T03:30:02+00:00