Added previous arduino implementations.

Problem3.cpp

@@ -0,0 +1,41 @@
+#include "WString.h"
+#include "HardwareSerial.h"
+#include "Problem3.hpp"
+#include "Arduino.h"
+#include "Vector.h"
+
+Problem3::Problem3() {
+  fl_input = 600851475143;
+
+  unsigned long primeArray[] = { 2 };
+  primes = Vector<unsigned long>(primeArray, 1);
+}
+
+bool Problem3::Step() {
+  Serial.println("iterator = " + String(iterator));
+  // Find prime
+  bool isPrime;
+  Serial.println("known primes = " + String(primes.size()));
+
+  for (unsigned long prime : primes) {
+    Serial.println("prime = " + String(prime));
+    isPrime = iterator % prime != 0;
+    if (!isPrime) break;
+  }
+
+  // Current value is new prime
+  if (isPrime) {
+    primes.push_back(iterator);
+    Serial.println("Found prime = " + String(iterator));
+    // Is number factor of input
+    if (fl_input / iterator == floor(fl_input / iterator)) {
+      // Save current prime as biggest prime and promote other factor as new max.
+      Serial.println("Found prime factor = " + String(iterator));
+      output = iterator;
+      fl_input = fl_input / iterator;
+    }
+  }
+  iterator++;
+  delay(1000);
+  return fl_input < iterator;
+}