is 2 65028217 - 1
has 19575444 decimal digits
takes 157.739 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
Actual27458.833964.8649 %----58.833964.8649 %
Target27458.833964.8649 %4500007000000014.91063.8620 %73.744666.2218 %
Difference----450000-70000000-14.9106-3.8620 %-14.9106-1.3569 %

Known prime factors (1 factor, 74.2 bits, 0.00011408% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
65028217214384597304587029865432374.183164839670526863
31 × 53 × 233 × 2081 × 206917
2013-09-04208120691766.0040.04660.0741

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2013-09-04Architects CubedR3202374.1832.0400.000%


Trial Factoring results:
575859606162636465666768697071727374
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2003-10-31Gordon Spencev4_computers212590.001
2004-02-141997rj7v4_computers212600.001
2022-03-30LordJuliusManual testing260264
2010-06-29Per Jessenlouiswu72642650.057
2010-07-02Per Jessenlouiswu72652660.115
2010-07-05Per Jessenlouiswu72662670.230
2010-07-09Per Jessenlouiswu72672680.460
2010-07-14Per Jessenlouiswu72682690.919
2012-01-13GrunwalderGIMPvangelis2692701.839
2013-04-03SMoffatManual testing2702713.677
2013-07-29gcardonaManual testing27127322.06
2013-09-03ChuckManual testing27327429.42


ECM factoring results:
No ECM results for M65028217


Lucas-Lehmer results:
No L-L results for M65028217


PRP results:
No PRP results for M65028217


CERT results:
No CERT results for M65028217


P-1 factor-bounds graph:
102
103
104
102
103
104
105
106
TF factor-bounds graph:
274
273
271
270
269
268
267
266
265
264
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