is 2 53220379 - 1
has 16020931 decimal digits
takes 101.956 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
Actual2681.120061.7647 %----1.120061.7647 %
Target27335.942064.3836 %3600006000000010.02613.9137 %45.968165.7775 %
Difference-5-34.8220-2.6189 %-360000-60000000-10.0261-3.9137 %-44.8481-4.0128 %

Known prime factors (1 factor, 69.8 bits, 0.00013121% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
5322037910492591462616267004792269.8309857682019341
32 × 13 × 19 × 14813 × 299359
2010-09-17148132993594.00400.08420.0846

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2010-09-17Craig Meyersseth2269.8301.9360.000%


Trial Factoring results:
5758596061626364656667686970717273
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-12-08ANONYMOUSv4_computers212532.25000e-5
2000-03-01ANONYMOUSv4_computers212544.51000e-5
2000-05-17ANONYMOUSv4_computers212560.000
2001-07-29ANONYMOUSv4_computers212570.000
2002-06-23ANONYMOUSv4_computers212580.001
2004-04-201997rj7v4_computers212600.001
2008-10-14ANONYMOUSManual testing212640.035
2008-12-18tmorrowVegan2642650.070
2008-12-20tmorrowVegan2652660.140
2008-12-25ANONYMOUSsmartC2D2662670.281
2009-04-26BIGMATHCore22672680.562


ECM factoring results:
No ECM results for M53220379


Lucas-Lehmer results:
No L-L results for M53220379


PRP results:
No PRP results for M53220379


CERT results:
No CERT results for M53220379


P-1 factor-bounds graph:
103
104
105
103
104
105
106
TF factor-bounds graph:
268
267
266
265
264
260
258
257
256
254
253
this exponent TF target: 73
TF double-checked to: 67
250
260
270
280
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Last modified: 2024-03-13T02:15:48+00:00