1. Erickson, Marty; Vazzana, Anthony; Garth, David (2016). Introduction to Number Theory. Textbooks in Mathematics (2nd ed.). Boca Raton, FL: CRC Press. p. 200. ISBN 978-1-4987-1749-6. MR 3468748
2. Koch, H. (1997). Algebraic Number Theory. Berlin: Springer-Verlag. p. 136. CiteSeerX 10.1.1.309.8812.doi :10.1007/978-3-642-58095-6. ISBN 978-3-540-63003-6. MR 1474965.
3. Eisenbud, David (1995). Commutative Algebra. Graduate Texts in Mathematics. 150. Berlin; New York: Springer-Verlag. Section 3.3.doi :10.1007/978-1-4612-5350-1. ISBN 978-0-387-94268-1. MR 1322960
4. Mollin, Richard A. (2002). "A brief history of factoring and primality testing B. C. (before computers)". Mathematics Magazine. 75 (1): 1829. doi:10.2307/3219180. JSTOR 3219180. MR 2107288.
5. Mollin, Richard A. (2002). "A brief history of factoring and primality testing B. C. (before computers)". Mathematics Magazine. 75 (1): 1829. doi:10.2307/3219180. JSTOR 3219180. MR 2107288.
6. Caldwell, Chris K. "The Top Twenty: Largest Known Primes". The Prime Pages. Retrieved 2017-01-03.