The polynomial 30x - 13 produces 411 primes for the first 1000 values of x.
411 is 12123 in base 4.
411 is a member of the Fibonacci-type sequence starting with 1 and 4.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiKpRjJErSJKNQse5OeKPrUDfJobpeG0KA56sqKe9RsIW5aUYPTrVhSY_vMOnfN_YD9ZAs6qQKSKdMNLmLhe7_cIogogO88GBpNZ52uCoJ5aNPOme77qL-JJJ_Q3kQmYEdRJLC31_Y2OEE/s400/n0411.jpg)
411 is the telephone number within the U.S. for information or directory services.
Source: Prime Curios!
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiKpRjJErSJKNQse5OeKPrUDfJobpeG0KA56sqKe9RsIW5aUYPTrVhSY_vMOnfN_YD9ZAs6qQKSKdMNLmLhe7_cIogogO88GBpNZ52uCoJ5aNPOme77qL-JJJ_Q3kQmYEdRJLC31_Y2OEE/s400/n0411.jpg)
411 is the telephone number within the U.S. for information or directory services.
Source: Prime Curios!