is 2 1466657 - 1
has 441508 decimal digits
takes 0.056 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LF711B651E2796C45double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26720.259668.6567 %2000000600000000.28577.2376 %20.545370.9252 %
Target2600.104765.0000 %65005000000.00181.4464 %0.106665.5062 %
Difference+7+20.1549+3.6567 %+1993500+59500000+0.2838+5.7912%+20.4387+5.4190 %

Known prime factors (2 factors, 146.5 bits, 0.00998580% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1466657107438757951932591340492373.1863662709070762032
24 × 3 × 3789193 × 20137913
2015-12-073789193201379131,304.20.25910.4269
1466657114001446085177560874492373.2713886438549885132
22 × 971609637471283
2019-03-2949716096374712831,304.22,930,6315,473,603

1 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2003-09-29Team Prime Ribv4_computers20000265000--0.0022.626%
2009-04-25axnManual testing8000001600000012--0.1059.869%
2015-05-24alpertronManual testing20000006000000012--0.33412.641%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2001-10-25ANONYMOUSv4_computers212570.013
2003-07-30ANONYMOUSv4_computers212580.026
2010-05-07Architects Cubeda3_bu22602610.105
2011-04-05GrunwalderGIMPManual testing212631.088
2015-04-01snme2pm1Manual testing2632641.339
2015-04-01snme2pm1Manual testing2642652.548
2015-09-20ramgeisManual testing2652665.095


ECM factoring results:
Total ECM effort:29.632 GHz-days
Estimated T-Level:25.701
DigitsB1CompleteFacMiss
201100014.5380.000%
25500001.64019.395%
302500000.14086.925%
3510000000.01099.024%


ECM Summary

B1B2factorcurvesGHz-days
10.142
50000500000020511.10
500005000000432.386
250000350000005016.00


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-05-09Alex Kruppav4_computersF711B651E2796C450.056
2015-07-04MadPooManual testingF711B651E2796C450.066


PRP results:
dateuseridcompidcofactorsres64
2017-09-30alpertronManual testing
10743875795193259134049
1C92E27ED5463F6C
2017-10-18Oliver KruseThreadripper-PC
10743875795193259134049
1C92E27ED5463F6C
2019-03-29ATHec2-PRPCF
10743875795193259134049
11400144608517756087449
A082E5E60E9F2EA2
2019-03-30kkmrkkblmbrbkc5.large
10743875795193259134049
11400144608517756087449
A082E5E60E9F2EA2


CERT results:
No CERT results for M1466657


P-1 factor-bounds graph:
B1 = 2000000, B2 = 60000000 (P-1 stage 2)
B1 = 2000000 (P-1 stage 1)
B1 = 800000, B2 = 16000000 (P-1 stage 2)
B1 = 800000 (P-1 stage 1)
B1 = 20000, B2 = 265000 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
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TF factor-bounds graph:
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this exponent TF target: 60
TF double-checked to: 67
ECM T-Level=25.7 ~= 69-bit
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Last modified: 2024-02-29T14:28:04+00:00