+0

# Help!!

+1
202
1
+363

For how many positive integers $$n\geq 2$$ is  $$1001_n$$ a prime number?

$$1000_n$$ means 1000 but in base n, and so you know what $$1001_n$$ is.

Jan 28, 2019

#1
+6043
+3

$$1001_n = n^3+1 = (n+1)(n^2-n+1) \text{ is never prime}$$

.
Jan 28, 2019

$$1001_n = n^3+1 = (n+1)(n^2-n+1) \text{ is never prime}$$