is 2 51986617 - 1
has 15649532 decimal digits
takes 99.593 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
Actual2692.296562.3188 %----2.296562.3188 %
Target27336.794964.3836 %340000550000009.21693.8051 %46.011865.7388 %
Difference-4-34.4984-2.0647 %-340000-55000000-9.2169-3.8051 %-43.7153-3.4200 %

Known prime factors (1 factor, 90.7 bits, 0.00017452% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
5198661720488951842201138990405772792890.72719705986871776190967
37 × 457 × 599 × 511213 × 3805849
2011-05-1351121338058496,250,3661.91872.8901

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2011-05-13DRHDRH132890.7274.0950.000%


Trial Factoring results:
5758596061626364656667686970717273
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2000-01-12ANONYMOUSv4_computers212532.31000e-5
2000-02-23ANONYMOUSv4_computers212544.62000e-5
2000-04-27ANONYMOUSv4_computers212560.000
2001-06-03ANONYMOUSv4_computers212570.000
2002-03-31ANONYMOUSv4_computers212580.001
2003-11-28apocalypsev4_computers212600.001
2022-04-05LordJuliusManual testing260263
2008-12-03Ilya PodkopaevMIET20082632650.110
2008-12-04James HeinrichQ66002652660.144
2008-12-05James HeinrichQ66002662670.287
2009-04-17Michael T.Desktop12672680.575
2010-03-25ANONYMOUS2682691.150


ECM factoring results:
No ECM results for M51986617


Lucas-Lehmer results:
No L-L results for M51986617


PRP results:
No PRP results for M51986617


CERT results:
No CERT results for M51986617


P-1 factor-bounds graph:
104
105
106
104
105
106
107
TF factor-bounds graph:
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
290
2100
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Last modified: 2024-03-13T02:15:48+00:00