is 2 62311973 - 1
has 18757773 decimal digits
takes 146.375 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
Actual27461.398664.8649 %----61.398664.8649 %
Target27461.398664.8649 %4000006500000013.35073.7242 %74.749366.1734 %
Difference----400000-65000000-13.3507-3.7242 %-13.3507-1.3085 %

Known prime factors (1 factor, 107.3 bits, 0.00017226% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
6231197320540062716341434333819778948683133107.3401648163404835651274741355
5 × 401 × 21773 × 146033 × 390043 × 662833
2013-06-023900436628332.273e+91.37922.7038

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2013-06-02owftheevilManual testing33107.3402.9320.000%


Trial Factoring results:
575859606162636465666768697071727374
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2003-06-30Gordon Spencev4_computers212590.001
2022-03-30LordJuliusManual testing21263
2008-12-24DerekDerek_Desk2632640.032
2009-02-15ANONYMOUS2642650.060
2009-02-17ANONYMOUSBOB2652660.120
2009-02-18glennpatlinux-tylerold2662670.240
2009-02-21fes016X32102672680.480
2009-07-30HighPriceRanchD8052682690.959
2012-08-07ktonyManual testing26927328.78
2013-05-29Tom DuellManual testing27327430.70


ECM factoring results:
No ECM results for M62311973


Lucas-Lehmer results:
No L-L results for M62311973


PRP results:
No PRP results for M62311973


CERT results:
No CERT results for M62311973


P-1 factor-bounds graph:
104
105
106
104
105
106
TF factor-bounds graph:
274
273
269
268
267
266
265
264
263
259
this exponent TF target: 74
TF double-checked to: 67
250
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Last modified: 2024-03-13T02:15:48+00:00