is 2 64606691 - 1
has 19448552 decimal digits
takes 156.716 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
Actual27459.217864.8649 %----59.217864.8649 %
Target27459.217864.8649 %4500007000000014.91063.8588 %74.128466.2207 %
Difference----450000-70000000-14.9106-3.8588 %-14.9106-1.3558 %

Known prime factors (1 factor, 76.0 bits, 0.00011760% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
64606691743121167001358521460572375.976575111614214508
22 × 3 × 7 × 59 × 269 × 2423 × 178039
2013-12-092423178039208.880.04220.0637

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2013-12-09Team_Inspectorthumbelina2375.9762.1080.000%


Trial Factoring results:
575859606162636465666768697071727374
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2003-09-29Gordon Spencev4_computers212590.001
2004-02-07AxelFoxv4_computers212600.001
2022-03-30LordJuliusManual testing260263
2009-03-12ANONYMOUS2632640.030
2009-03-19ScoutWBC-FileServer2642650.058
2010-01-30Sturle Sundegowin.ifi2652660.116
2010-02-07Sturle Sundemoe.intern2662670.231
2010-02-07ScotchHome2672680.463
2010-02-16thej_man1042jf-p952682690.925
2011-09-30america64Manual testing2692701.851
2012-05-31america64Manual testing2702713.701
2013-10-18Mark RoseManual testing2712727.403
2013-11-25BdotManual testing27227444.42


ECM factoring results:
No ECM results for M64606691


Lucas-Lehmer results:
No L-L results for M64606691


PRP results:
No PRP results for M64606691


CERT results:
No CERT results for M64606691


P-1 factor-bounds graph:
102
103
104
102
103
104
105
106
TF factor-bounds graph:
274
272
271
270
269
268
267
266
265
264
263
260
259
this exponent TF target: 74
TF double-checked to: 67
250
260
270
280
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Last modified: 2024-03-13T02:15:48+00:00