$par
[1] 1977.8631050 1995.2463508 2012.0000000 2024.3568389    0.4979858

$objective
[1] 1.369319

$convergence
[1] 1

$iterations
[1] 127

$evaluations
function gradient 
     200      740 

$message
[1] "function evaluation limit reached without convergence (9)"

