is 2 56047913 - 1
has 16872104 decimal digits
takes 118.790 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
Actual2718.529863.3803 %----8.529863.3803 %
Target27334.128764.3836 %3600006000000011.09223.9395 %45.221065.7867 %
Difference-2-25.5989-1.0033 %-360000-60000000-11.0922-3.9395 %-36.6912-2.4064 %

Known prime factors (1 factor, 86.8 bits, 0.00015479% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
560479131309336957770593113133479032786.7591168051482818453127
3 × 73 × 359 × 2027 × 61723 × 118747
2012-01-1861723118747408,3370.19920.3860

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2012-01-18Hiroyuki YasuiPen4-Omy2786.7592.3660.000%


Trial Factoring results:
5758596061626364656667686970717273
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-12-01ANONYMOUSv4_computers212532.14000e-5
2000-03-01ANONYMOUSv4_computers212544.28000e-5
2000-05-31ANONYMOUSv4_computers212560.000
2001-09-16ANONYMOUSv4_computers212570.000
2002-08-31ANONYMOUSv4_computers212580.001
2004-09-021997rj7v4_computers212600.001
2022-06-15LordJuliusManual testing260263
2008-06-13James HeinrichQ66002632640.034
2008-06-13Sturle Sundepapageno.ifi2642650.067
2008-06-15Sturle Sundecelair.ifi2652660.133
2008-06-16Sturle Sundecelair.ifi2662670.267
2009-11-18Torchwood InstituteQ6600v22672680.533
2011-04-09TheJudgerManual testing2682703.200
2011-08-09The Magic ForestDreamRez12702714.266


ECM factoring results:
No ECM results for M56047913


Lucas-Lehmer results:
No L-L results for M56047913


PRP results:
No PRP results for M56047913


CERT results:
No CERT results for M56047913


P-1 factor-bounds graph:
103
104
105
103
104
105
106
TF factor-bounds graph:
271
270
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
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Last modified: 2024-03-13T02:15:48+00:00