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;
- 37 588 869 ÷ 2 = 18 794 434 + 1;
- 18 794 434 ÷ 2 = 9 397 217 + 0;
- 9 397 217 ÷ 2 = 4 698 608 + 1;
- 4 698 608 ÷ 2 = 2 349 304 + 0;
- 2 349 304 ÷ 2 = 1 174 652 + 0;
- 1 174 652 ÷ 2 = 587 326 + 0;
- 587 326 ÷ 2 = 293 663 + 0;
- 293 663 ÷ 2 = 146 831 + 1;
- 146 831 ÷ 2 = 73 415 + 1;
- 73 415 ÷ 2 = 36 707 + 1;
- 36 707 ÷ 2 = 18 353 + 1;
- 18 353 ÷ 2 = 9 176 + 1;
- 9 176 ÷ 2 = 4 588 + 0;
- 4 588 ÷ 2 = 2 294 + 0;
- 2 294 ÷ 2 = 1 147 + 0;
- 1 147 ÷ 2 = 573 + 1;
- 573 ÷ 2 = 286 + 1;
- 286 ÷ 2 = 143 + 0;
- 143 ÷ 2 = 71 + 1;
- 71 ÷ 2 = 35 + 1;
- 35 ÷ 2 = 17 + 1;
- 17 ÷ 2 = 8 + 1;
- 8 ÷ 2 = 4 + 0;
- 4 ÷ 2 = 2 + 0;
- 2 ÷ 2 = 1 + 0;
- 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.
37 588 869(10) = 10 0011 1101 1000 1111 1000 0101(2)
3. Determine the signed binary number bit length:
The base 2 number's actual length, in bits: 26.
- 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, 26,
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 37 588 869(10) converted to signed binary in two's complement representation:
Spaces were used to group digits: for binary, by 4, for decimal, by 3.