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diff --git a/challenge-146/mohammad-anwar/swift/ch-1.swift b/challenge-146/mohammad-anwar/swift/ch-1.swift
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+import Foundation
+
+/*
+
+Week 146:
+
+    https://theweeklychallenge.org/blog/perl-weekly-challenge-146
+
+Task #1: 10001st Prime Number
+
+    Write a script to generate the 10001st prime number.
+
+*/
+
+enum ParamError: Error {
+    case missingIndex
+    case invalidIndex
+}
+
+do {
+    let paramCount:Int = Int(CommandLine.argc)
+
+    if paramCount <= 1 {
+        throw ParamError.missingIndex
+    }
+
+    let count:Int = Int(CommandLine.arguments[1])!
+    if count > 0 {
+        var c:Int = 0
+        var n:Int = 2
+        while c <= count {
+            if isPrime(n) == 1 {
+                c += 1
+                if c == count {
+                    print(n)
+                }
+            }
+            n += 1
+        }
+    }
+    else {
+        throw ParamError.invalidIndex
+    }
+}
+catch ParamError.missingIndex {
+    print("Missing index count.")
+}
+catch ParamError.invalidIndex {
+    print("Invalid index count.")
+}
+catch let error {
+    print(error)
+}
+
+//
+//
+// Functions
+
+func isPrime(_ n:Int) -> Int {
+    let j:Int = Int(sqrt(Float(n)))
+    if j >= 2 {
+        for i in 2...j {
+            if n % i == 0 {
+                return 0
+            }
+        }
+    }
+    return 1
+}