is 2 64426009 - 1
has 19394162 decimal digits
takes 156.278 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
Actual27459.383964.8649 %----59.383964.8649 %
Target27459.383964.8649 %4500007000000014.91063.8575 %74.294566.2202 %
Difference----450000-70000000-14.9106-3.8575 %-14.9106-1.3553 %

Known prime factors (1 factor, 86.4 bits, 0.00013418% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
644260091052322200358774896108493372786.444816690507989385852
22 × 35 × 1163 × 1361 × 14939 × 35533
2013-11-081493935533436,5820.05650.1069

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2013-11-08RichD0Manual testing2786.4442.9320.000%


Trial Factoring results:
575859606162636465666768697071727374
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2003-09-14Gordon Spencev4_computers212590.001
2004-01-27AxelFoxv4_computers212600.001
2022-03-30LordJuliusManual testing260263
2009-03-10Abadpruebas42632640.030
2009-03-13Abadpruebas42642650.058
2009-03-16Abadpruebas42652660.116
2009-03-19Abadpruebas42662670.232
2009-09-26Sturle Sundegouffy.ifi2672680.464
2009-09-28Sturle Sundegouffy.ifi2682690.928
2012-01-17Johan ViljoenL12692701.856
2013-05-07RichD0Manual testing27027211.14
2013-11-07BdotManual testing27227444.54


ECM factoring results:
No ECM results for M64426009


Lucas-Lehmer results:
No L-L results for M64426009


PRP results:
No PRP results for M64426009


CERT results:
No CERT results for M64426009


P-1 factor-bounds graph:
103
104
105
103
104
105
TF factor-bounds graph:
274
272
270
269
268
267
266
265
264
263
260
259
this exponent TF target: 74
TF double-checked to: 67
250
260
270
280
290
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Last modified: 2024-03-13T02:15:48+00:00