Data commit

Task/Additive-primes/Python/additive-primes.py

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+def is_prime(n: int) -> bool:
+    if n <= 3:
+        return n > 1
+    if n % 2 == 0 or n % 3 == 0:
+        return False
+    i = 5
+    while i ** 2 <= n:
+        if n % i == 0 or n % (i + 2) == 0:
+            return False
+        i += 6
+    return True
+
+def digit_sum(n: int) -> int:
+    sum = 0
+    while n > 0:
+        sum += n % 10
+        n //= 10
+    return sum
+
+def main() -> None:
+    additive_primes = 0
+    for i in range(2, 500):
+        if is_prime(i) and is_prime(digit_sum(i)):
+            additive_primes += 1
+            print(i, end=" ")
+    print(f"\nFound {additive_primes} additive primes less than 500")
+
+if __name__ == "__main__":
+    main()