$par
[1] 1963.0010981 1980.3479185 2016.8835092 2018.4140485    0.6874562

$objective
[1] 1.519592

$convergence
[1] 0

$iterations
[1] 39

$evaluations
function gradient 
      43      240 

$message
[1] "both X-convergence and relative convergence (5)"

