cuban prime

Etymology
Punningly on (mathematical sense) and, though there is no meaningful connection with the country of Cuba.

Noun

 * 1)  A prime number that is a solution to one of two specific equations involving third powers of x and y. The two equations are $$p = \frac{x^3 - y^3}{x - y},\ x = y + 1,\ y>0$$ and $$p = \frac{x^3 - y^3}{x - y},\ x = y + 2,\ y>0.$$