is 2 64117987 - 1
has 19301438 decimal digits
takes 155.531 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
Actual27459.669164.8649 %----59.669164.8649 %
Target27459.669164.8649 %4000007000000014.74433.7918 %74.413566.1971 %
Difference----400000-70000000-14.7443-3.7918 %-14.7443-1.3323 %

Known prime factors (1 factor, 76.0 bits, 0.00011856% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
64117987766864535403892420667992376.021598010457973277
137 × 547 × 719 × 2617 × 4241
2013-11-0526174241431.750.00950.0187

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2013-11-05Architects Cubedpfs2376.0211.9590.000%


Trial Factoring results:
575859606162636465666768697071727374
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-11-17ANONYMOUSv4_computers212502.30000e-6
2003-08-25Gordon Spencev4_computers212590.001
2004-01-18AxelFoxv4_computers212600.001
2022-03-30LordJuliusManual testing260263
2009-03-08bamShark2632640.031
2009-03-09ComputerraRUsmartC2D2642650.058
2009-03-15ANONYMOUS2652660.117
2009-03-20ANONYMOUS2662670.233
2009-03-21Genesis_1_1AMD-be23002672680.466
2009-09-21Mike Rmollyprime2682690.932
2012-01-20america64Manual testing2692701.865
2013-04-21lycornManual testing2702713.729
2013-08-28PhantomasManual testing2712727.459
2013-09-17RichD0Manual testing27227444.75


ECM factoring results:
No ECM results for M64117987


Lucas-Lehmer results:
No L-L results for M64117987


PRP results:
No PRP results for M64117987


CERT results:
No CERT results for M64117987


P-1 factor-bounds graph:
102
103
104
102
103
104
TF factor-bounds graph:
274
272
271
270
269
268
267
266
265
264
263
260
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