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;
- 833 891 456 ÷ 2 = 416 945 728 + 0;
- 416 945 728 ÷ 2 = 208 472 864 + 0;
- 208 472 864 ÷ 2 = 104 236 432 + 0;
- 104 236 432 ÷ 2 = 52 118 216 + 0;
- 52 118 216 ÷ 2 = 26 059 108 + 0;
- 26 059 108 ÷ 2 = 13 029 554 + 0;
- 13 029 554 ÷ 2 = 6 514 777 + 0;
- 6 514 777 ÷ 2 = 3 257 388 + 1;
- 3 257 388 ÷ 2 = 1 628 694 + 0;
- 1 628 694 ÷ 2 = 814 347 + 0;
- 814 347 ÷ 2 = 407 173 + 1;
- 407 173 ÷ 2 = 203 586 + 1;
- 203 586 ÷ 2 = 101 793 + 0;
- 101 793 ÷ 2 = 50 896 + 1;
- 50 896 ÷ 2 = 25 448 + 0;
- 25 448 ÷ 2 = 12 724 + 0;
- 12 724 ÷ 2 = 6 362 + 0;
- 6 362 ÷ 2 = 3 181 + 0;
- 3 181 ÷ 2 = 1 590 + 1;
- 1 590 ÷ 2 = 795 + 0;
- 795 ÷ 2 = 397 + 1;
- 397 ÷ 2 = 198 + 1;
- 198 ÷ 2 = 99 + 0;
- 99 ÷ 2 = 49 + 1;
- 49 ÷ 2 = 24 + 1;
- 24 ÷ 2 = 12 + 0;
- 12 ÷ 2 = 6 + 0;
- 6 ÷ 2 = 3 + 0;
- 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.
833 891 456(10) = 11 0001 1011 0100 0010 1100 1000 0000(2)
3. Determine the signed binary number bit length:
The base 2 number's actual length, in bits: 30.
- 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, 30,
3) so that the first bit (leftmost) could be zero
(we deal with a positive number at this moment)
=== is: 32.
4. Get the positive binary computer representation on 32 bits (4 Bytes):
If needed, add extra 0s in front (to the left) of the base 2 number, up to the required length, 32.
Decimal Number 833 891 456(10) converted to signed binary in one's complement representation: