is 2 1320091 - 1
has 397387 decimal digits
takes 0.042 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LBC3BFE698E8E77F5double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26722.509068.6567 %40816791510221340.55558.7329 %23.064571.3939 %
Target2600.116365.0000 %55002000000.00070.9766 %0.117165.3418 %
Difference+7+22.3926+3.6567 %+4076179+150822134+0.5548+7.7563%+22.9474+6.0521 %

Known prime factors (1 factor, 67.7 bits, 0.00512477% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
13200912318274874524503375772167.65287807388828668
22 × 3 × 29 × 31 × 8139357511
2016-08-2331813935751122.50920.38038.064

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2002-04-07Jossv4_computers20000295000--0.0022.653%
2003-11-16eteov4_computers200000200000012--0.0145.909%
2014-06-16mikrMSI408167915102213412--0.55614.581%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2001-11-03ANONYMOUSv4_computers212570.015
2003-06-17ANONYMOUSv4_computers212580.029
2016-02-23Mark RoseManual testing2582600.087
2009-02-14Sturle Sunderodolfo.ifi2602610.116
2012-09-17AxelssonManual testing2612620.233
2013-01-10dbaughManual testing2622630.744
2015-04-10snme2pm1Manual testing2632641.487
2015-04-10snme2pm1Manual testing2642652.830
2015-10-02ramgeisManual testing2652665.661


ECM factoring results:
Total ECM effort:20.703 GHz-days
Estimated T-Level:25.704
DigitsB1CompleteFacMiss
201100014.6540.000%
25500001.65119.189%
302500000.14186.866%
3510000000.01099.021%


ECM Summary

B1B2factorcurvesGHz-days
5000050000002489.455
50000500000030.116
250000350000005011.13


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2016-06-02MadPooManual testingBC3BFE698E8E77F50.042


PRP results:
dateuseridcompidcofactorsres64
2017-09-30Oliver KruseGTX-3
231827487452450337577
EB7AC721D5FFB740
2017-10-23kkmrkkblmbrbkc4.xlarge
231827487452450337577
EB7AC721D5FFB740


CERT results:
No CERT results for M1320091


P-1 factor-bounds graph:
B1 = 4081679, B2 = 151022134 (P-1 stage 2)
B1 = 4081679 (P-1 stage 1)
B1 = 200000, B2 = 2000000 (P-1 stage 2)
B1 = 200000 (P-1 stage 1)
B1 = 20000, B2 = 295000 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
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1010
TF factor-bounds graph:
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265
264
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