is 2 53737883 - 1
has 16176715 decimal digits
takes 106.170 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
Actual2681.109261.7647 %----1.109261.7647 %
Target27335.595864.3836 %3600006000000010.33993.9185 %45.935765.7792 %
Difference-5-34.4866-2.6189 %-360000-60000000-10.3399-3.9185 %-44.8266-4.0145 %

Known prime factors (1 factor, 79.8 bits, 0.00014854% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
5373788310696164743106275513436712579.8239952164233103745
5 × 467 × 1951 × 12119 × 180263
2011-02-19121191802633,207.90.06100.0707

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2011-02-19Craig MeyersManual testing2579.8232.4590.000%


Trial Factoring results:
5758596061626364656667686970717273
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-12-08ANONYMOUSv4_computers212532.23000e-5
2000-03-01ANONYMOUSv4_computers212544.47000e-5
2000-05-24ANONYMOUSv4_computers212560.000
2001-08-18ANONYMOUSv4_computers212570.000
2002-07-27ANONYMOUSv4_computers212580.001
2004-06-041997rj7v4_computers212600.001
2007-09-131997rj7v4_computers212630.018
2008-06-23ANONYMOUSManual testing212640.035
2008-12-21Sturle Sundebakeng.ifi2642650.070
2008-12-21Sturle Sundepapageno.ifi2652660.139
2008-12-22ANONYMOUSteytey2662670.278
2009-07-04arnaudSRV-3302672680.556


ECM factoring results:
No ECM results for M53737883


Lucas-Lehmer results:
No L-L results for M53737883


PRP results:
No PRP results for M53737883


CERT results:
No CERT results for M53737883


P-1 factor-bounds graph:
103
104
105
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
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Last modified: 2024-03-13T02:15:48+00:00