Initial data commit

Task/Parallel-calculations/Java/parallel-calculations.java

@@ -0,0 +1,37 @@
+import static java.lang.System.out;
+import static java.util.Arrays.stream;
+import static java.util.Comparator.comparing;
+
+public interface ParallelCalculations {
+    public static final long[] NUMBERS = {
+      12757923,
+      12878611,
+      12878893,
+      12757923,
+      15808973,
+      15780709,
+      197622519
+    };
+
+    public static void main(String... arguments) {
+      stream(NUMBERS)
+        .unordered()
+        .parallel()
+        .mapToObj(ParallelCalculations::minimalPrimeFactor)
+        .max(comparing(a -> a[0]))
+        .ifPresent(res -> out.printf(
+          "%d has the largest minimum prime factor: %d%n",
+          res[1],
+          res[0]
+        ));
+    }
+
+    public static long[] minimalPrimeFactor(long n) {
+      for (long i = 2; n >= i * i; i++) {
+        if (n % i == 0) {
+          return new long[]{i, n};
+        }
+      }
+      return new long[]{n, n};
+    }
+}