is 2 64774273 - 1
has 19499000 decimal digits
takes 157.123 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
Actual27459.064664.8649 %----59.064664.8649 %
Target27459.064664.8649 %4500007000000014.91063.8601 %73.975266.2211 %
Difference----450000-70000000-14.9106-3.8601 %-14.9106-1.3562 %

Known prime factors (1 factor, 85.4 bits, 0.00013185% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
64774273511580489799654131447035372685.403394894814025665816
23 × 53 × 239 × 1033 × 2713 × 1390489
2013-07-3127131390489161,7120.27550.4977

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2013-07-31TheJudgerManual testing2685.4032.9320.000%


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_112632640.030
2010-02-06ENJD1622C-002642650.058
2010-02-08arnaudSRV-2402652660.115
2010-02-12arnaudSRV-2402662670.231
2010-02-14unconnectedE6400-12672680.461
2010-02-17unconnectedE6400-12682690.923
2012-01-09oodaira052692701.846
2013-05-17BdotManual testing27027325.84
2013-07-13Jerry HallettManual testing27327429.53


ECM factoring results:
No ECM results for M64774273


Lucas-Lehmer results:
No L-L results for M64774273


PRP results:
No PRP results for M64774273


CERT results:
No CERT results for M64774273


P-1 factor-bounds graph:
102
103
104
102
103
104
105
106
107
TF factor-bounds graph:
274
273
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
JSON version of this page
Last modified: 2024-03-13T02:15:48+00:00