Convert 1 011 000 010 011 308 to a Signed Binary (Base 2)

How to convert 1 011 000 010 011 308(10), a signed base 10 integer number? How to write it as a signed binary code in base 2

What are the required steps to convert base 10 integer
number 1 011 000 010 011 308 to signed binary code (in base 2)?

  • 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;
  • 1 011 000 010 011 308 ÷ 2 = 505 500 005 005 654 + 0;
  • 505 500 005 005 654 ÷ 2 = 252 750 002 502 827 + 0;
  • 252 750 002 502 827 ÷ 2 = 126 375 001 251 413 + 1;
  • 126 375 001 251 413 ÷ 2 = 63 187 500 625 706 + 1;
  • 63 187 500 625 706 ÷ 2 = 31 593 750 312 853 + 0;
  • 31 593 750 312 853 ÷ 2 = 15 796 875 156 426 + 1;
  • 15 796 875 156 426 ÷ 2 = 7 898 437 578 213 + 0;
  • 7 898 437 578 213 ÷ 2 = 3 949 218 789 106 + 1;
  • 3 949 218 789 106 ÷ 2 = 1 974 609 394 553 + 0;
  • 1 974 609 394 553 ÷ 2 = 987 304 697 276 + 1;
  • 987 304 697 276 ÷ 2 = 493 652 348 638 + 0;
  • 493 652 348 638 ÷ 2 = 246 826 174 319 + 0;
  • 246 826 174 319 ÷ 2 = 123 413 087 159 + 1;
  • 123 413 087 159 ÷ 2 = 61 706 543 579 + 1;
  • 61 706 543 579 ÷ 2 = 30 853 271 789 + 1;
  • 30 853 271 789 ÷ 2 = 15 426 635 894 + 1;
  • 15 426 635 894 ÷ 2 = 7 713 317 947 + 0;
  • 7 713 317 947 ÷ 2 = 3 856 658 973 + 1;
  • 3 856 658 973 ÷ 2 = 1 928 329 486 + 1;
  • 1 928 329 486 ÷ 2 = 964 164 743 + 0;
  • 964 164 743 ÷ 2 = 482 082 371 + 1;
  • 482 082 371 ÷ 2 = 241 041 185 + 1;
  • 241 041 185 ÷ 2 = 120 520 592 + 1;
  • 120 520 592 ÷ 2 = 60 260 296 + 0;
  • 60 260 296 ÷ 2 = 30 130 148 + 0;
  • 30 130 148 ÷ 2 = 15 065 074 + 0;
  • 15 065 074 ÷ 2 = 7 532 537 + 0;
  • 7 532 537 ÷ 2 = 3 766 268 + 1;
  • 3 766 268 ÷ 2 = 1 883 134 + 0;
  • 1 883 134 ÷ 2 = 941 567 + 0;
  • 941 567 ÷ 2 = 470 783 + 1;
  • 470 783 ÷ 2 = 235 391 + 1;
  • 235 391 ÷ 2 = 117 695 + 1;
  • 117 695 ÷ 2 = 58 847 + 1;
  • 58 847 ÷ 2 = 29 423 + 1;
  • 29 423 ÷ 2 = 14 711 + 1;
  • 14 711 ÷ 2 = 7 355 + 1;
  • 7 355 ÷ 2 = 3 677 + 1;
  • 3 677 ÷ 2 = 1 838 + 1;
  • 1 838 ÷ 2 = 919 + 0;
  • 919 ÷ 2 = 459 + 1;
  • 459 ÷ 2 = 229 + 1;
  • 229 ÷ 2 = 114 + 1;
  • 114 ÷ 2 = 57 + 0;
  • 57 ÷ 2 = 28 + 1;
  • 28 ÷ 2 = 14 + 0;
  • 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.

1 011 000 010 011 308(10) = 11 1001 0111 0111 1111 1100 1000 0111 0110 1111 0010 1010 1100(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) is reserved for 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:


1 011 000 010 011 308(10) Base 10 integer number converted and written as a signed binary code (in base 2):

1 011 000 010 011 308(10) = 0000 0000 0000 0011 1001 0111 0111 1111 1100 1000 0111 0110 1111 0010 1010 1100

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


How to convert signed base 10 integers in decimal to binary code system

Follow the steps below to convert a signed base ten integer number to signed binary:

  • 1. In a signed binary, first bit (the leftmost) is reserved for sign: 0 = positive integer number, 1 = positive integer number. If the number to be converted is negative, start with its positive version.
  • 2. Divide repeatedly by 2 the positive integer number keeping track of each remainder. STOP when 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 have a length of 4, 8, 16, 32, 64, ... bits (power of 2) - if needed, fill in extra '0' bits in front of the base 2 number (to the left), up to the right length; this way the first bit (the leftmost one) is always '0', as for a positive representation.
  • 5. To get the negative reprezentation of the number, simply switch the first bit (the leftmost one), from '0' to '1'.

Example: convert the negative number -63 from decimal system (base ten) to signed binary code system:

  • 1. Start with the positive version of the number: |-63| = 63;
  • 2. Divide repeatedly 63 by 2, keeping track of each remainder, until we get a quotient that is equal to zero:
    • division = quotient + remainder
    • 63 ÷ 2 = 31 + 1
    • 31 ÷ 2 = 15 + 1
    • 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:
    63(10) = 11 1111(2)
  • 4. The actual length of base 2 representation number is 6, so the positive binary computer representation length of the signed binary will take in this case 8 bits (the least power of 2 higher than 6) - add extra '0's in front (to the left), up to the required length; this way the first bit (the leftmost one) is to be '0', as for a positive number:
    63(10) = 0011 1111(2)
  • 5. To get the negative integer number representation simply change the first bit (the leftmost), from '0' to '1':
    -63(10) = 1011 1111
  • Number -63(10), signed integer, converted from decimal system (base 10) to signed binary = 1011 1111