Petris

Petris is a math based puzzle game where your goal is to get rid of falling numbers by placing them next to their divisors, or by placing three prime numbers in a row.

If a number is placed in the neighborhood (top, bottom, left, right) of one of its divisors, it is divided by the divisor and the divisor is eliminated. In case of multiple divisors, the number is divided by the least common multiple of the divisors, and all of its divisors are eliminated. If three or more prime numbers (a number divisible only by one and itself) lie in a row (sideways or upright), they will all be eliminated.