is 2 5871907 - 1
has 1767621 decimal digits
takes 1.041 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L0FC1DD44B3D61F01double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2675.060465.6716 %20000650000.00580.7560 %5.066165.9312 %
Target2662.515165.1515 %4000040000000.06572.3394 %2.580865.9668 %
Difference+1+2.5453+0.5201 %-20000-3935000-0.0600-1.5834 %+2.4853-0.0356 %

Known prime factors (1 factor, 74.6 bits, 0.00127089% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
5871907291376003945238932491112374.6252481101999275865
5 × 7 × 1217 × 53887 × 1080941
2011-03-03538871080941863.810.02820.0283

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2000-09-29ANONYMOUSv4_computers2000065000--0.0060.883%
2011-03-03markrtiny2374.6250.0530.000%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1998-05-16Thav4_computers212620.052
2009-02-17GrunwalderGIMPManual testing2622630.167


ECM factoring results:
No ECM results for M5871907


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-09-20ANONYMOUSv4_computers0FC1DD44B3D61F011.041
2000-10-15ANONYMOUSv4_computers0FC1DD44B3D61F011.041


PRP results:
dateuseridcompidcofactorsres64
2017-09-20kkmrkkblmbrbkManual testing
29137600394523893249111
360F403E62157A1A
2018-09-05Oliver KruseGTX-0
29137600394523893249111
360F403E62157A1A


CERT results:
No CERT results for M5871907


P-1 factor-bounds graph:
B1 = 20000, B2 = 65000 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
103
104
105
103
104
105
106
107
TF factor-bounds graph:
263
262
this exponent TF target: 66
TF double-checked to: 67
250
260
270
280
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Last modified: 2024-03-13T02:15:48+00:00