is 2 55490447 - 1
has 16704290 decimal digits
takes 117.609 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
Actual27217.234263.8889 %----17.234263.8889 %
Target27334.471664.3836 %3600006000000011.09223.9345 %45.563865.7849 %
Difference-1-17.2374-0.4947 %-360000-60000000-11.0922-3.9345 %-28.3296-1.8960 %

Known prime factors (1 factor, 101.1 bits, 0.00018220% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
55490447272508758209920870689647834960931101.10424554565059632775231532
22 × 3 × 132 × 257 × 45943 × 193993 × 5285983
2012-05-0619399352859832.662e+91.44881.6531

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2012-05-06Craig MeyersManual testing31101.1042.4590.000%


Trial Factoring results:
5758596061626364656667686970717273
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-12-15ANONYMOUSv4_computers212532.16000e-5
2000-03-01ANONYMOUSv4_computers212544.32000e-5
2000-05-31ANONYMOUSv4_computers212560.000
2001-09-30ANONYMOUSv4_computers212570.000
2002-07-27ANONYMOUSv4_computers212580.001
2022-06-14LordJuliusManual testing21263
2009-01-121997rj7compw2632640.035
2009-01-18Team_Deutschlandtim_test2642660.202
2009-01-24Team_Deutschlandtim_test2662670.269
2009-12-31Marion2672680.539
2011-04-12frolyarfrol-work2682691.077
2011-06-04oilwarzonedotcomsuei52692702.155
2012-04-10bcp19Manual testing27027212.93


ECM factoring results:
No ECM results for M55490447


Lucas-Lehmer results:
No L-L results for M55490447


PRP results:
No PRP results for M55490447


CERT results:
No CERT results for M55490447


P-1 factor-bounds graph:
104
105
106
104
105
106
107
TF factor-bounds graph:
272
270
269
268
267
266
264
263
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