is 2 51168727 - 1
has 15403322 decimal digits
takes 93.738 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
Actual27218.689863.8889 %----18.689863.8889 %
Target27337.383164.3836 %340000550000008.81373.7973 %46.196865.7360 %
Difference-1-18.6933-0.4947 %-340000-55000000-8.8137-3.7973 %-27.5070-1.8471 %

Known prime factors (1 factor, 78.6 bits, 0.00015370% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
511687274735861602639982321890492478.6484627691443877412
22 × 3 × 15013 × 39079 × 657313
2012-01-01390796573131,292.70.19330.2113

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2012-01-01Sid & AndyHand_In_The_Box2478.6482.7030.000%


Trial Factoring results:
5758596061626364656667686970717273
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-10-15ANONYMOUSv4_computers212532.35000e-5
2000-02-16ANONYMOUSv4_computers212544.69000e-5
2000-04-05ANONYMOUSv4_computers212560.000
2001-05-06ANONYMOUSv4_computers212570.000
2002-02-10ANONYMOUSv4_computers212580.001
2003-10-14apocalypsev4_computers212600.002
2022-04-05LordJuliusManual testing260263
2008-11-26bayannebayanne_clv42632650.111
2008-11-28bayannebayanne_clv42652660.146
2008-12-03BranMuffinBrowning2662670.292
2009-04-20driveByUpgradesDBUcusttest12672680.584
2009-09-18Roman Maznichenkox64-Second2682691.168
2011-11-27Eric ChristensonManual testing2692702.337
2011-12-01Jerry HallettManual testing2702714.673
2011-12-04ChuckManual testing2712729.347


ECM factoring results:
No ECM results for M51168727


Lucas-Lehmer results:
No L-L results for M51168727


PRP results:
No PRP results for M51168727


CERT results:
No CERT results for M51168727


P-1 factor-bounds graph:
103
104
105
103
104
105
106
TF factor-bounds graph:
272
271
270
269
268
267
266
265
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