👉 In mathematics, a polyeidic number is a positive integer that can be expressed as the sum of two or more distinct powers of 2. For example, 10 = 2^2 + 2^1 and 15 = 2^3 + 2^1. Polyeidic numbers are useful in cryptography because they make it easier to generate large prime numbers and factorize them. Polyeidic numbers can be defined as follows: a positive integer