Convert 1 111 000 001 110 600 to a Signed Binary in Two's (2's) Complement Representation

How to convert decimal number 1 111 000 001 110 600(10) to a signed binary in two's (2's) complement representation

What are the steps to convert decimal number
1 111 000 001 110 600 to a signed binary in two's (2's) complement representation?

  • A signed integer, written in base ten, or a decimal system number, is a number written using the digits 0 through 9 and the sign, which can be positive (+) or negative (-). If positive, the sign is usually not written. A number written in base two, or binary, is a number written using only the digits 0 and 1.

1. Divide the number repeatedly by 2:

Keep track of each remainder.

We stop when we get a quotient that is equal to zero.


  • division = quotient + remainder;
  • 1 111 000 001 110 600 ÷ 2 = 555 500 000 555 300 + 0;
  • 555 500 000 555 300 ÷ 2 = 277 750 000 277 650 + 0;
  • 277 750 000 277 650 ÷ 2 = 138 875 000 138 825 + 0;
  • 138 875 000 138 825 ÷ 2 = 69 437 500 069 412 + 1;
  • 69 437 500 069 412 ÷ 2 = 34 718 750 034 706 + 0;
  • 34 718 750 034 706 ÷ 2 = 17 359 375 017 353 + 0;
  • 17 359 375 017 353 ÷ 2 = 8 679 687 508 676 + 1;
  • 8 679 687 508 676 ÷ 2 = 4 339 843 754 338 + 0;
  • 4 339 843 754 338 ÷ 2 = 2 169 921 877 169 + 0;
  • 2 169 921 877 169 ÷ 2 = 1 084 960 938 584 + 1;
  • 1 084 960 938 584 ÷ 2 = 542 480 469 292 + 0;
  • 542 480 469 292 ÷ 2 = 271 240 234 646 + 0;
  • 271 240 234 646 ÷ 2 = 135 620 117 323 + 0;
  • 135 620 117 323 ÷ 2 = 67 810 058 661 + 1;
  • 67 810 058 661 ÷ 2 = 33 905 029 330 + 1;
  • 33 905 029 330 ÷ 2 = 16 952 514 665 + 0;
  • 16 952 514 665 ÷ 2 = 8 476 257 332 + 1;
  • 8 476 257 332 ÷ 2 = 4 238 128 666 + 0;
  • 4 238 128 666 ÷ 2 = 2 119 064 333 + 0;
  • 2 119 064 333 ÷ 2 = 1 059 532 166 + 1;
  • 1 059 532 166 ÷ 2 = 529 766 083 + 0;
  • 529 766 083 ÷ 2 = 264 883 041 + 1;
  • 264 883 041 ÷ 2 = 132 441 520 + 1;
  • 132 441 520 ÷ 2 = 66 220 760 + 0;
  • 66 220 760 ÷ 2 = 33 110 380 + 0;
  • 33 110 380 ÷ 2 = 16 555 190 + 0;
  • 16 555 190 ÷ 2 = 8 277 595 + 0;
  • 8 277 595 ÷ 2 = 4 138 797 + 1;
  • 4 138 797 ÷ 2 = 2 069 398 + 1;
  • 2 069 398 ÷ 2 = 1 034 699 + 0;
  • 1 034 699 ÷ 2 = 517 349 + 1;
  • 517 349 ÷ 2 = 258 674 + 1;
  • 258 674 ÷ 2 = 129 337 + 0;
  • 129 337 ÷ 2 = 64 668 + 1;
  • 64 668 ÷ 2 = 32 334 + 0;
  • 32 334 ÷ 2 = 16 167 + 0;
  • 16 167 ÷ 2 = 8 083 + 1;
  • 8 083 ÷ 2 = 4 041 + 1;
  • 4 041 ÷ 2 = 2 020 + 1;
  • 2 020 ÷ 2 = 1 010 + 0;
  • 1 010 ÷ 2 = 505 + 0;
  • 505 ÷ 2 = 252 + 1;
  • 252 ÷ 2 = 126 + 0;
  • 126 ÷ 2 = 63 + 0;
  • 63 ÷ 2 = 31 + 1;
  • 31 ÷ 2 = 15 + 1;
  • 15 ÷ 2 = 7 + 1;
  • 7 ÷ 2 = 3 + 1;
  • 3 ÷ 2 = 1 + 1;
  • 1 ÷ 2 = 0 + 1;

2. Construct the base 2 representation of the positive number:

Take all the remainders starting from the bottom of the list constructed above.

1 111 000 001 110 600(10) = 11 1111 0010 0111 0010 1101 1000 0110 1001 0110 0010 0100 1000(2)

3. Determine the signed binary number bit length:

  • The base 2 number's actual length, in bits: 50.

  • A signed binary's bit length must be equal to a power of 2, as of:
  • 21 = 2; 22 = 4; 23 = 8; 24 = 16; 25 = 32; 26 = 64; ...
  • The first bit (the leftmost) indicates the sign:
  • 0 = positive integer number, 1 = negative integer number

The least number that is:

1) a power of 2

2) and is larger than the actual length, 50,

3) so that the first bit (leftmost) could be zero
(we deal with a positive number at this moment)

=== is: 64.


4. Get the positive binary computer representation on 64 bits (8 Bytes):

If needed, add extra 0s in front (to the left) of the base 2 number, up to the required length, 64.


Decimal Number 1 111 000 001 110 600(10) converted to signed binary in two's complement representation:

1 111 000 001 110 600(10) = 0000 0000 0000 0011 1111 0010 0111 0010 1101 1000 0110 1001 0110 0010 0100 1000

Spaces were used to group digits: for binary, by 4, for decimal, by 3.

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How to convert signed integers from decimal system to signed binary in two's complement representation

Follow the steps below to convert a signed base 10 integer number to signed binary in two's complement representation:

  • 1. If the number to be converted is negative, start with the positive version of the number.
  • 2. Divide repeatedly by 2 the positive representation of the integer number, keeping track of each remainder, until we get a quotient that is zero.
  • 3. Construct the base 2 representation of the positive number, by taking all the remainders starting from the bottom of the list constructed above. Thus, the last remainder of the divisions becomes the first symbol (the leftmost) of the base two number, while the first remainder becomes the last symbol (the rightmost).
  • 4. Binary numbers represented in computer language must have 4, 8, 16, 32, 64, ... bit length (a power of 2) - if needed, add extra bits on 0 in front (to the left) of the base 2 number above, up to the required length, so that the first bit (the leftmost) will be 0, correctly representing a positive number.
  • 5. To get the negative integer number representation in signed binary one's complement, replace all 0 bits with 1s and all 1 bits with 0s (reversing the digits).
  • 6. To get the negative integer number, in signed binary two's complement representation, add 1 to the number above.

Example: convert the negative number -60 from the decimal system (base ten) to signed binary in two's complement:

  • 1. Start with the positive version of the number: |-60| = 60
  • 2. Divide repeatedly 60 by 2, keeping track of each remainder:
    • division = quotient + remainder
    • 60 ÷ 2 = 30 + 0
    • 30 ÷ 2 = 15 + 0
    • 15 ÷ 2 = 7 + 1
    • 7 ÷ 2 = 3 + 1
    • 3 ÷ 2 = 1 + 1
    • 1 ÷ 2 = 0 + 1
  • 3. Construct the base 2 representation of the positive number, by taking all the remainders starting from the bottom of the list constructed above:
    60(10) = 11 1100(2)
  • 4. Bit length of base 2 representation number is 6, so the positive binary computer representation of a signed binary will take in this particular case 8 bits (the least power of 2 larger than 6) - add extra 0 digits in front of the base 2 number, up to the required length:
    60(10) = 0011 1100(2)
  • 5. To get the negative integer number representation in signed binary one's complement, replace all the 0 bits with 1s and all 1 bits with 0s (reversing the digits):
    !(0011 1100) = 1100 0011
  • 6. To get the negative integer number, signed binary in two's complement representation, add 1 to the number above:
    -60(10) = 1100 0011 + 1 = 1100 0100
  • Number -60(10), signed integer, converted from decimal system (base 10) to signed binary two's complement representation = 1100 0100