is 2 64186433 - 1
has 19322042 decimal digits
takes 155.697 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
Actual27459.605564.8649 %----59.605564.8649 %
Target27459.605564.8649 %4000007000000014.74433.7923 %74.349966.1973 %
Difference----400000-70000000-14.7443-3.7923 %-14.7443-1.3324 %

Known prime factors (1 factor, 75.9 bits, 0.00011826% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
64186433708748108175040404484012375.908552101180147400
23 × 3 × 52 × 13 × 89 × 1237 × 642931
2013-06-141237642931157.920.12730.2301

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2013-06-14HBendtzHAL90072375.9083.9590.000%


Trial Factoring results:
575859606162636465666768697071727374
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2003-08-25Gordon Spencev4_computers212590.001
2004-01-18AxelFoxv4_computers212600.001
2022-03-30LordJuliusManual testing260263
2009-03-08Sturle Sundegigotte.ifi2632640.031
2009-03-11Steve_Richtersteven12642650.058
2009-03-17ANONYMOUS2652660.116
2009-03-24SADMASTERACER_I52662670.233
2009-03-24ANONYMOUS2672680.466
2009-09-16KriZpopt2682690.931
2012-05-19omiXorpLLB17-990-032692701.863
2013-04-25ChuckManual testing27027455.88


ECM factoring results:
No ECM results for M64186433


Lucas-Lehmer results:
No L-L results for M64186433


PRP results:
No PRP results for M64186433


CERT results:
No CERT results for M64186433


P-1 factor-bounds graph:
102
103
104
102
103
104
105
106
TF factor-bounds graph:
274
270
269
268
267
266
265
264
263
260
259
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