This is the number of inputs taken by the Ackermann function, and a famous conjecture states that there are infinitely many pairs of primes with a difference of this number.
A theorem states that all simple polygons except triangles have at least this many ears, and the third term in Conway's look-and-say sequence begins with this digit. This is the number of inputs taken by the Ackermann function, and a famous conjecture states that there are infinitely many pairs of primes with a difference of this number. Taking this many derivatives of a function can tell you if it is (*) convex or concave. This number is equal to the sum of one plus one half plus one fourth up until infinity, and it is the number of solutions to a quadratic equation. For ten points, name this number which is the smallest and only even prime.
A theorem states that all simple polygons except triangles have at least this many ears, and the third term in Conway's look-and-say sequence begins with this digit.
two [accept word forms] &lt;MS&gt;