is 2 63376507 - 1
has 19078230 decimal digits
takes 148.876 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
Actual27460.367364.8649 %----60.367364.8649 %
Target27460.367364.8649 %4000007000000014.27863.7862 %74.645966.1952 %
Difference----400000-70000000-14.2786-3.7862 %-14.2786-1.3303 %

Known prime factors (1 factor, 75.9 bits, 0.00011971% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
63376507689636499961839521908332375.868544078975480488
23 × 34 × 7 × 103 × 16607 × 70123
2013-09-161660770123212.940.06650.1151

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2013-09-16BdotHeizer2375.8681.9420.000%


Trial Factoring results:
575859606162636465666768697071727374
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-11-17ANONYMOUSv4_computers212502.40000e-6
2003-07-30Gordon Spencev4_computers212590.001
2022-03-30LordJuliusManual testing21263
2009-02-21Wojciech Florekarmada22632640.031
2009-02-26glennpatLinux-72642650.059
2009-02-27glennpatLinux-72652660.118
2009-02-28glennpatLinux-72662670.236
2009-03-07glennpatLinux-72672680.472
2010-05-05ANONYMOUSKaiPu2682690.943
2011-12-28symalladSchool_Laptop2692701.887
2012-08-15GrunwalderGIMPcompute-0-32702713.773
2013-03-06Jerry HallettManual testing27127322.64
2013-08-26BigBrotherManual testing27327430.19


ECM factoring results:
No ECM results for M63376507


Lucas-Lehmer results:
No L-L results for M63376507


PRP results:
No PRP results for M63376507


CERT results:
No CERT results for M63376507


P-1 factor-bounds graph:
103
104
105
103
104
105
TF factor-bounds graph:
274
273
271
270
269
268
267
266
265
264
263
259
250
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