is 2 1432271 - 1
has 431157 decimal digits
takes 0.055 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L7EEBBFA20D5FD9DBdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26720.746068.6567 %2500000625000000.31947.3975 %21.065470.9753 %
Target2600.107265.0000 %60004500000.00171.3535 %0.108965.4737 %
Difference+7+20.6388+3.6567 %+2494000+62050000+0.3177+6.0440%+20.9565+5.5016 %

Known prime factors (1 factor, 79.9 bits, 0.00558028% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
143227111474296828028919502218412579.925400563050848230520
23 × 5 × 4447 × 15271 × 147460699
2016-08-1815271147460699132,8490.44560.8307

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2009-08-08markrlounge20000050000006--0.0307.181%
2014-11-12JossManual testing244813244813--0.0163.266%
2015-01-27JossManual testing325845325845--0.0213.642%
2015-01-29JossManual testing358429358429--0.0233.771%
2015-02-12JossManual testing394271394271--0.0263.903%
2015-02-25JossManual testing477067477067--0.0314.174%
2015-03-02JossManual testing524773524773--0.0344.313%
2015-03-10JossManual testing577250577250--0.0374.454%
2015-03-17JossManual testing634975634975--0.0414.597%
2015-04-08JossManual testing768319768319--0.0504.890%
2015-04-13alpertronManual testing20000006000000012--0.33412.615%
2016-08-18Bruno Victal5820K.ECM2500000625000001222579.9250.31912.814%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2001-10-13ANONYMOUSv4_computers212570.013
2003-07-21ANONYMOUSv4_computers212580.027
2009-02-15Sturle Sundegimo.ifi2602610.107
2011-05-07GrunwalderGIMPManual testing212631.114
2016-02-23Mark RoseManual testing2582630.980
2015-03-20snme2pm1Manual testing2632653.979
2015-10-11ramgeisManual testing2652665.217


ECM factoring results:
Total ECM effort:29.431 GHz-days
Estimated T-Level:25.704
DigitsB1CompleteFacMiss
201100014.6540.000%
25500001.65119.189%
302500000.14186.866%
3510000000.01099.021%


ECM Summary

B1B2factorcurvesGHz-days
50000500000025113.50
250000350000005015.93


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2002-10-19ANONYMOUSv4_computers7EEBBFA20D5FD9DB0.055
2016-05-02kkmrkkblmbrbkold7EEBBFA20D5FD9DB0.055


PRP results:
dateuseridcompidcofactorsres64
2017-09-30Oliver KruseGTX-2
1147429682802891950221841
EDCC94B1E024B64B
2017-10-26kkmrkkblmbrbkc4.xlarge
1147429682802891950221841
EDCC94B1E024B64B


CERT results:
No CERT results for M1432271


P-1 factor-bounds graph:
B1 = 2500000, B2 = 62500000 (P-1 stage 2)
B1 = 2000000, B2 = 60000000 (P-1 stage 2)
B1 = 2500000 (P-1 stage 1)
B1 = 2000000 (P-1 stage 1)
B1 = 768319 (P-1 stage 1)
B1 = 634975 (P-1 stage 1)
B1 = 577250 (P-1 stage 1)
B1 = 524773 (P-1 stage 1)
B1 = 477067 (P-1 stage 1)
B1 = 200000, B2 = 5000000 (P-1 stage 2)
B1 = 394271 (P-1 stage 1)
B1 = 358429 (P-1 stage 1)
B1 = 325845 (P-1 stage 1)
B1 = 244813 (P-1 stage 1)
B1 = 200000 (P-1 stage 1)
103
104
105
106
107
103
104
105
106
107
108
109
TF factor-bounds graph:
266
265
263
261
258
257
this exponent TF target: 60
TF double-checked to: 67
ECM T-Level=25.7 ~= 69-bit
250
260
270
280
JSON version of this page
Last modified: 2024-03-13T02:15:48+00:00