BigNumber library for Arduino devices.
Use 256-bit numbers on tiny platforms.
ported from https://github.com/nickgammon/BigNumber
- Any Arduino Device: (recommended model) Adafruit Feather HUZZAH with ESP8266 WiFi
- Arduino IDE: https://www.arduino.cc/en/Main/Software
  BigNumber.begin();  BigNumber bigNum;
  bigNum = "67411411944031530524562029520200239450929984281572279077458355238873731477537";  BigNumber bigNum = "67411411944031530524562029520200239450929984281572279077458355238873731477537";  BigNumber bigNum = "67411411944031530524562029520200239450929984281572279077458355238873731477537";
  BigNumber base = 16;
  BigNumber multiplier = base.pow(8);
  bigNum *= multiplier;  BigNumber bigNum = "67411411944031530524562029520200239450929984281572279077458355238873731477537";
  Serial.println(bigNum);67411411944031530524562029520200239450929984281572279077458355238873731477537