$par
[1] 1961.8847792 1975.1557901 2016.2671446 2022.7203330    0.8632893

$objective
[1] 1.118188

$convergence
[1] 0

$iterations
[1] 50

$evaluations
function gradient 
      61      272 

$message
[1] "X-convergence (3)"

