From b7e9046bc6057c86876dea280353e0159e9e067f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jan=20Christian=20Gr=C3=BCnhage?=
 <mail@janchristiangruenhage.de>
Date: Tue, 15 Nov 2016 11:50:50 +0000
Subject: [PATCH] Add
 'src/de/janchristiangruenhage/demo/math/multiplication/BWMathe.java'

This was the only (kind of) relevant file form an old github repo, I wont migrate the whole repo, especially, since keeping it in this repo makes way more sense.
---
 .../demo/math/multiplication/BWMathe.java     | 67 +++++++++++++++++++
 1 file changed, 67 insertions(+)
 create mode 100644 src/de/janchristiangruenhage/demo/math/multiplication/BWMathe.java

diff --git a/src/de/janchristiangruenhage/demo/math/multiplication/BWMathe.java b/src/de/janchristiangruenhage/demo/math/multiplication/BWMathe.java
new file mode 100644
index 0000000..69260b7
--- /dev/null
+++ b/src/de/janchristiangruenhage/demo/math/multiplication/BWMathe.java
@@ -0,0 +1,67 @@
+package de.janchristiangruenhage.demo.math.multiplication;
+
+import java.io.FileNotFoundException;
+import java.math.BigInteger;
+
+/**
+ * Created by green on 12/8/2015.
+ */
+public class BWMathe {
+    public static void main(String[] args) {
+        Output out = null;
+        try {
+            out = new Output("bwmathe_1.txt");
+        } catch (FileNotFoundException e) {
+            e.printStackTrace();
+        }
+//        for (int i = 1; i < 2016; i++) {
+//            String multiplierOneString = "1";
+//            String multiplierTwoString = "1";
+//            for (int j = 0; j < i; j++) {
+//                multiplierOneString += "01";
+//                multiplierTwoString += "00";
+//            }
+//            multiplierTwoString += "01";
+//            BigInteger multiplierOneBigInt = new BigInteger(multiplierOneString);
+//            BigInteger multiplierTwoBigInt = new BigInteger(multiplierTwoString);
+//            BigInteger result = multiplierOneBigInt.multiply(multiplierTwoBigInt);
+//            String resultString = (result.toString());
+//            int numberOfInitialZeroes = ((resultString.length() - 1) / 2);
+//            for (int j = 0; j < i; j++) {
+//                multiplierTwoString += "00";
+//            }
+//            multiplierTwoString += "01";
+//            multiplierTwoBigInt = new BigInteger(multiplierTwoString);
+//            result = multiplierOneBigInt.multiply(multiplierTwoBigInt);
+//            resultString = (result.toString());
+//            int numberOfAdditiveZeroes = (((resultString.length() - 1) / 2) - numberOfInitialZeroes);
+//            if ((2016 - numberOfInitialZeroes) % numberOfAdditiveZeroes  == 0) {
+//                out.println("Found a Solution: \n" +
+//                        "Number is dividable by " + multiplierOneString + "\n" +
+//                        "i = " + i);
+//            }
+//        }
+//
+        String numberString = "1";
+        for (int i = 0; i < 2016; i++) {
+            numberString += "01";
+        }
+        BigInteger numberBigInt = new BigInteger(numberString);
+//        boolean isPrime = numberBigInt.isProbablePrime(500);
+//        out.println(new Boolean(isPrime).toString());
+
+        BigInteger divisor = new BigInteger("2");
+        while (true) {
+            if (numberBigInt.mod(divisor) == BigInteger.ZERO) {
+                out.println("Found a Solution: \n" +
+                        "Number is dividable by " + divisor.toString() + "; \n" +
+                        "Result is " +numberBigInt.divide(divisor) + "; ");
+            }
+            if (divisor.mod(new BigInteger("1000000")) == BigInteger.ZERO) {
+                System.out.println("Status update: " + divisor.toString());
+            }
+            divisor = divisor.add(BigInteger.ONE);
+        }
+
+    }
+}
\ No newline at end of file