#MATLAB, 49 bytes @(x)find(~any(bsxfun(@rem,1:prod(1:x),(1:x)')),1)
MATLAB, 49 bytes
@(x)find(~any(bsxfun(@rem,1:prod(1:x),(1:x)')),1)
#MATLAB, 49 bytes @(x)find(~any(bsxfun(@rem,1:prod(1:x),(1:x)')),1)
MATLAB, 49 bytes
@(x)find(~any(bsxfun(@rem,1:prod(1:x),(1:x)')),1)