Printing Resolution

[IconJB]

The printer where I am getting my panoramic printed has a native resolution of 360dpi. I wanted the panormaic to come out a bit bigger. Should I use 180dpi, a resolution that divides evenly into 360? its going on the wall, on a colorplak, I think 180dpi is high enough, but is it the right #?

The file is 13,466 x 2,088.

Thanks

JB