$par
[1] 1957.4243443 1988.4422109 2018.8981453 2019.4183926    0.7674376

$objective
[1] 1.290577

$convergence
[1] 0

$iterations
[1] 51

$evaluations
function gradient 
      65      286 

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

