is 2 39012851 - 1
has 11744039 decimal digits
takes 51.367 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
Actual2681.527861.7647 %----1.527861.7647 %
Target27224.513363.8889 %260000400000004.63003.6643 %29.143365.2121 %
Difference-4-22.9855-2.1242 %-260000-40000000-4.6300-3.6643 %-27.6155-3.4474 %

Known prime factors (1 factor, 70.8 bits, 0.00018155% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
3901285120971438599831295495512270.82926877603228525
32 × 52 × 7 × 34183 × 499229
2009-02-25341834992299.05030.11360.1328

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2009-02-25David J. Stuckiztong2270.8291.8150.000%


Trial Factoring results:
57585960616263646566676869707172
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2003-09-14ANONYMOUSv4_computers212590.001
2003-09-29ANONYMOUSv4_computers212600.002
2006-09-11Amit Arorav4_computers212680.766


ECM factoring results:
No ECM results for M39012851


Lucas-Lehmer results:
No L-L results for M39012851


PRP results:
No PRP results for M39012851


CERT results:
No CERT results for M39012851


P-1 factor-bounds graph:
103
104
105
103
104
105
106
TF factor-bounds graph:
268
260
259
this exponent TF target: 72
TF double-checked to: 67
250
260
270
280
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Last modified: 2024-03-13T02:15:48+00:00