Convert 1 001 110 099 756 to a Signed Binary in One's (1's) Complement Representation

How to convert decimal number 1 001 110 099 756(10) to a signed binary in one's (1's) complement representation

What are the steps to convert decimal number
1 001 110 099 756 to a signed binary in one's (1'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.

Stop when you get a quotient that is equal to zero.


  • division = quotient + remainder;
  • 1 001 110 099 756 ÷ 2 = 500 555 049 878 + 0;
  • 500 555 049 878 ÷ 2 = 250 277 524 939 + 0;
  • 250 277 524 939 ÷ 2 = 125 138 762 469 + 1;
  • 125 138 762 469 ÷ 2 = 62 569 381 234 + 1;
  • 62 569 381 234 ÷ 2 = 31 284 690 617 + 0;
  • 31 284 690 617 ÷ 2 = 15 642 345 308 + 1;
  • 15 642 345 308 ÷ 2 = 7 821 172 654 + 0;
  • 7 821 172 654 ÷ 2 = 3 910 586 327 + 0;
  • 3 910 586 327 ÷ 2 = 1 955 293 163 + 1;
  • 1 955 293 163 ÷ 2 = 977 646 581 + 1;
  • 977 646 581 ÷ 2 = 488 823 290 + 1;
  • 488 823 290 ÷ 2 = 244 411 645 + 0;
  • 244 411 645 ÷ 2 = 122 205 822 + 1;
  • 122 205 822 ÷ 2 = 61 102 911 + 0;
  • 61 102 911 ÷ 2 = 30 551 455 + 1;
  • 30 551 455 ÷ 2 = 15 275 727 + 1;
  • 15 275 727 ÷ 2 = 7 637 863 + 1;
  • 7 637 863 ÷ 2 = 3 818 931 + 1;
  • 3 818 931 ÷ 2 = 1 909 465 + 1;
  • 1 909 465 ÷ 2 = 954 732 + 1;
  • 954 732 ÷ 2 = 477 366 + 0;
  • 477 366 ÷ 2 = 238 683 + 0;
  • 238 683 ÷ 2 = 119 341 + 1;
  • 119 341 ÷ 2 = 59 670 + 1;
  • 59 670 ÷ 2 = 29 835 + 0;
  • 29 835 ÷ 2 = 14 917 + 1;
  • 14 917 ÷ 2 = 7 458 + 1;
  • 7 458 ÷ 2 = 3 729 + 0;
  • 3 729 ÷ 2 = 1 864 + 1;
  • 1 864 ÷ 2 = 932 + 0;
  • 932 ÷ 2 = 466 + 0;
  • 466 ÷ 2 = 233 + 0;
  • 233 ÷ 2 = 116 + 1;
  • 116 ÷ 2 = 58 + 0;
  • 58 ÷ 2 = 29 + 0;
  • 29 ÷ 2 = 14 + 1;
  • 14 ÷ 2 = 7 + 0;
  • 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.

1 001 110 099 756(10) = 1110 1001 0001 0110 1100 1111 1101 0111 0010 1100(2)

3. Determine the signed binary number bit length:

  • The base 2 number's actual length, in bits: 40.

  • 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, 40,

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 1 001 110 099 756(10) converted to signed binary in one's complement representation:

1 001 110 099 756(10) = 0000 0000 0000 0000 0000 0000 1110 1001 0001 0110 1100 1111 1101 0111 0010 1100

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


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

Follow the steps below to convert a signed base 10 integer number to signed binary in one'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 that is to be converted to binary, keeping track of each remainder, until we get a quotient that is equal to 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, fill in '0' bits in front (to the left) of the base 2 number calculated above, up to the right length; this way the first bit (leftmost) will always 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 '1's and all '1' bits with '0's.

Example: convert the negative number -49 from the decimal system (base ten) to signed binary one's complement:

  • 1. Start with the positive version of the number: |-49| = 49
  • 2. Divide repeatedly 49 by 2, keeping track of each remainder:
    • division = quotient + remainder
    • 49 ÷ 2 = 24 + 1
    • 24 ÷ 2 = 12 + 0
    • 12 ÷ 2 = 6 + 0
    • 6 ÷ 2 = 3 + 0
    • 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:
    49(10) = 11 0001(2)
  • 4. The actual bit length of base 2 representation is 6, so the positive binary computer representation of a signed binary will take in this case 8 bits (the least power of 2 that is larger than 6) - add '0's in front of the base 2 number, up to the required length:
    49(10) = 0011 0001(2)
  • 5. To get the negative integer number representation in signed binary one's complement, replace all '0' bits with '1's and all '1' bits with '0's:
    -49(10) = 1100 1110
  • Number -49(10), signed integer, converted from the decimal system (base 10) to signed binary in one's complement representation = 1100 1110