is 2 64695857 - 1
has 19475394 decimal digits
takes 156.932 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
Actual27459.136264.8649 %----59.136264.8649 %
Target27459.136264.8649 %4500007000000014.91063.8595 %74.046866.2209 %
Difference----450000-70000000-14.9106-3.8595 %-14.9106-1.3560 %

Known prime factors (1 factor, 84.8 bits, 0.00013115% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
64695857348349382001880793750217832684.849269220780243996763
72 × 13 × 23 × 613 × 17623 × 1700987
2014-03-0817623170098776,0650.38460.6088

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2014-03-08James Heinrich3930K2684.8494.1240.000%


Trial Factoring results:
575859606162636465666768697071727374
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2003-09-29Gordon Spencev4_computers212590.001
2004-02-07AxelFoxv4_computers212600.001
2022-03-30LordJuliusManual testing260263
2009-05-31Architects Cubedm1_132632640.030
2009-10-12Andrey Kurgannikovhome-22642650.058
2010-01-17arnaudSRV-1402652660.116
2010-02-09Pridmoreloungelaptop2662670.231
2010-02-15TRUSTNO1dimension2672680.462
2010-02-18Torchwood InstituteATH2-630W7x642682690.924
2011-12-26america64Manual testing2692701.848
2012-09-09TMarshallWin7_642702713.696
2013-11-04america64Manual testing2712727.392
2013-11-24TheJudgerManual testing27227444.35


ECM factoring results:
No ECM results for M64695857


Lucas-Lehmer results:
No L-L results for M64695857


PRP results:
No PRP results for M64695857


CERT results:
No CERT results for M64695857


P-1 factor-bounds graph:
103
104
105
103
104
105
106
107
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
290
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Last modified: 2024-03-13T02:15:48+00:00