is 2 53868473 - 1
has 16216027 decimal digits
takes 106.428 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
Actual2681.106561.7647 %----1.106561.7647 %
Target27335.509564.3836 %3600006000000010.33993.9197 %45.849465.7796 %
Difference-5-34.4030-2.6189 %-360000-60000000-10.3399-3.9197 %-44.7430-4.0149 %

Known prime factors (1 factor, 100.4 bits, 0.00018635% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
53868473165275423478786824103406784659331100.38315340644933334830569952
25 × 33 × 43 × 173 × 1451 × 270761 × 6075217
2011-03-2927076160752172.510e+91.68161.7710

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2011-03-29ixfd64tsbu-reg-acer-331100.3834.2380.000%


Trial Factoring results:
5758596061626364656667686970717273
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-12-08ANONYMOUSv4_computers212532.23000e-5
2000-03-01ANONYMOUSv4_computers212544.46000e-5
2000-05-31ANONYMOUSv4_computers212560.000
2001-08-24ANONYMOUSv4_computers212570.000
2002-08-03ANONYMOUSv4_computers212580.001
2004-06-041997rj7v4_computers212600.001
2007-10-171997rj7v4_computers212630.018
2008-08-18ANONYMOUSManual testing212640.035
2008-12-22Sturle Sundezumthor.ifi2642650.069
2009-01-22Sturle Sundezumthor.ifi2652660.139
2009-01-26rick2941server22662670.277
2009-05-02Thomas SprengerElara2672680.555


ECM factoring results:
No ECM results for M53868473


Lucas-Lehmer results:
No L-L results for M53868473


PRP results:
No PRP results for M53868473


CERT results:
No CERT results for M53868473


P-1 factor-bounds graph:
104
105
106
104
105
106
107
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
2100
2110
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Last modified: 2024-03-13T02:15:48+00:00