Some Primes Are 1 More Than a Square

question 92

Multiple Choice

Some primes are 1 more than a square. For example, 5 = 2 ² + 1. Can you find any other primes p so that p = n ² + 1? ​

• A) 2, 5, 7, ...
• B) 3, 4, 17, ...
• C) 13, 17, 65,...
• D) 3, 7, 17,...
• E) 5, 17, 37, ...

---

Definitions:

Early Supporters

Individuals or groups that first back or endorse a new idea, project, or innovation.

Evolution

The process through which populations of organisms change over generations, driven by mechanisms such as natural selection and genetic drift.

Chordate

A member of a diverse phylum of animals that includes the vertebrates, lancelets, and tunicates. As embryos, chordates all have a notochord (a hollow nerve cord), pharyngeal gill slits, and a post-anal tail. Many present-day chordates lose or modify these structures as they develop into adults.