is 2 7915513 - 1
has 2382807 decimal digits
takes 1.811 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L5F049FA9B6A108DDdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2673.753965.6716 %400004200000.02011.8158 %3.774066.2950 %
Target2673.753965.6716 %5500060000000.12572.5625 %3.879666.5513 %
Difference----15000-5580000-0.1056-0.7467 %-0.1056-0.2563 %

Known prime factors (1 factor, 71.6 bits, 0.00090466% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
791551335999601672447793441692271.608227399043324468
22 × 3 × 17 × 89 × 9551 × 1311353
2012-10-139551131135369.6570.02670.0443

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2002-05-25ANONYMOOSv4_computers40000420000--0.0201.816%
2002-06-09ANONYMOOSv4_computers40000420000--0.0201.816%
2003-01-25ANONYMOOSv4_computers40000420000--0.0201.816%
2003-02-02ANONYMOOSv4_computers40000420000--0.0201.816%
2003-02-24ANONYMOOSv4_computers40000420000--0.0201.816%
2003-04-10ANONYMOOSv4_computers40000420000--0.0201.816%
2003-08-08ANONYMOOSv4_computers40000420000--0.0201.816%
2012-10-13NesowaWork2271.6080.0660.000%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1998-08-09ANONYMOUSv4_computers212620.039
1998-09-27ANONYMOUSv4_computers212630.124


ECM factoring results:
No ECM results for M7915513


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-12-01ANONYMOUSv4_computers5F049FA9B6A108DD1.811
2002-06-09ANONYMOOSv4_computers5F049FA9B6A108DD1.811
2003-01-25ANONYMOOSv4_computers5F049FA9B6A108DD1.811
2003-02-02ANONYMOOSv4_computers5F049FA9B6A108DD1.811
2003-02-24ANONYMOOSv4_computers5F049FA9B6A108DD1.811
2003-04-10ANONYMOOSv4_computers5F049FA9B6A108DD1.811
2003-08-08ANONYMOOSv4_computers5F049FA9B6A108DD1.811


PRP results:
dateuseridcompidcofactorsres64
2018-06-08Martin RussellThunderChoad
3599960167244779344169
5DF5419D15537D94
2019-11-18Ivan MLAB
3599960167244779344169
5DF5419D15537D94


CERT results:
No CERT results for M7915513


P-1 factor-bounds graph:
B1 = 40000, B2 = 420000 (P-1 stage 2)
B1 = 40000 (P-1 stage 1)
102
103
104
105
102
103
104
105
106
107
TF factor-bounds graph:
263
262
this exponent TF target: 67
TF double-checked to: 67
250
260
270
280
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Last modified: 2024-03-13T02:15:48+00:00