10

This number is a composite.

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

1¹ + 2² + 3³ + 4⁴ + 5⁵ + 6⁶ + 7⁷ + 8⁸ + 9⁹ + 10¹⁰ is prime. [Kulsha]

The 10-bit number (1110101001) containing zeros on prime positions and units on non-prime positions, reading right-to-left, is a binary emirp. [Kulsha]