is 2 53547553 - 1
has 16119420 decimal digits
takes 105.794 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
Actual2681.113161.7647 %----1.113161.7647 %
Target27335.722364.3836 %3600006000000010.33993.9167 %46.062365.7786 %
Difference-5-34.6092-2.6189 %-360000-60000000-10.3399-3.9167 %-44.9491-4.0139 %

Known prime factors (1 factor, 83.7 bits, 0.00015629% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
53547553156028383031923070813903512683.690145691422194327975
33 × 52 × 7 × 31 × 1319 × 6197 × 121687
2011-01-12619712168742,4030.03580.0361

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2011-01-12S485122I5202683.6901.8050.000%


Trial Factoring results:
5758596061626364656667686970717273
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-12-08ANONYMOUSv4_computers212532.24000e-5
2000-03-01ANONYMOUSv4_computers212544.48000e-5
2000-05-24ANONYMOUSv4_computers212560.000
2001-08-12ANONYMOUSv4_computers212570.000
2002-07-14ANONYMOUSv4_computers212580.001
2004-05-111997rj7v4_computers212600.001
2007-09-281997rj7v4_computers212630.018
2008-08-04ANONYMOUSManual testing212640.035
2008-12-20ANONYMOUS2642650.070
2008-12-28ANONYMOUS2652660.140
2009-03-21ANONYMOUS2662670.279
2009-05-09Sturle Sundeklughardt.ifi2672680.558


ECM factoring results:
No ECM results for M53547553


Lucas-Lehmer results:
No L-L results for M53547553


PRP results:
No PRP results for M53547553


CERT results:
No CERT results for M53547553


P-1 factor-bounds graph:
102
103
104
102
103
104
105
106
TF factor-bounds graph:
268
267
266
265
264
263
260
258
257
256
254
253
this exponent TF target: 73
TF double-checked to: 67
250
260
270
280
290
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Last modified: 2024-03-13T02:15:48+00:00