Why would you suggest using :: if you want me to use . ???

rust/src/p0003.rs

@@ -12,5 +12,5 @@ What is the largest prime factor of the number 600851475143 ?
 use crate::primes::prime_factors;
 
 pub fn p0003() -> u64 {
-    return prime_factors(600851475143).max()::expect("This number has prime factors");
+    return prime_factors(600851475143).max().expect("This number has prime factors");
 }