Express $144$ as the sum of twin primes.

A list consists of the following pairs of numbers:

$51,53; 55,57; 59,61; 63,65; 67,69; 71,73$

Categorize them as pairs of co-primes

A list consists of the following pairs of numbers: $51, 53, 55, 57, 59, 61,63, 65, 67, 69, 71, 73$

Categorise them as prime numbers.

A list consists of the following pairs of numbers: $51, 53, 55, 57, 59, 61, 63, 65, 67, 69, 71, 73$

Categorize them as composite numbers.

A number having only two factors is called a _____.

A number having more than two factors is called a _____.