Here are the best results for some larger n

n=50:
10103227010941311274359836137139151576179181919922


n=100:
10103050901040941070353596223311241251271313449137139145751516362816463675239227764876179181919943373793479838382

     
n=168, all primes under 1000:
1010305090104090701060703223311241251271280922727431313613713911814557164151574574632575761823928344914929346619179188353563582773349536269199479737367395696775876487799588787938368389