Prime number seems to be trending topic for programming contest. As such, **Piyash**, being an aspiring competitive programmer, started learning about theories and algorithms related to prime numbers. A prime number is a positive integer `$p \gt 1$`

that has no positive integer divisors other than `$1$`

and `$p$`

itself. **Piyash** read somewhere that all prime numbers except `$2$`

are odd.

This is a companion discussion topic for the original entry at https://toph.co/p/odd-prime