1206447

This number is a composite.

Just showing those entries submitted by 'Bajpai': (Click here to show all)

The smallest integer n such that 2+n, 2+n.n, 2+n.n.n, 2+n.n.n.n, 2+n.n.n.n.n and 2+n.n.n.n.n.n are all prime numbers. The dot (.) indicates concatenation. [Bajpai]