<p><a href="https://www.prepswift.com/quizzes/quiz/prepswift-the-primes" target="_blank">The Primes Exercise</a></p><p>Primes are of course the "building blocks" of numbers in that every positive integer greater than $1$ can be "broken down to its prime factors" via prime factorization.</p>
<p>And of course primes only have two positive factors: $1$ and itself.</p>
<p>We recommend memorizing <strong><u>all</u></strong> primes from $1$ to $50$. There are $15$ of them. </p>
<p>$$2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47$$</p>