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;
- 11 001 109 972 ÷ 2 = 5 500 554 986 + 0;
- 5 500 554 986 ÷ 2 = 2 750 277 493 + 0;
- 2 750 277 493 ÷ 2 = 1 375 138 746 + 1;
- 1 375 138 746 ÷ 2 = 687 569 373 + 0;
- 687 569 373 ÷ 2 = 343 784 686 + 1;
- 343 784 686 ÷ 2 = 171 892 343 + 0;
- 171 892 343 ÷ 2 = 85 946 171 + 1;
- 85 946 171 ÷ 2 = 42 973 085 + 1;
- 42 973 085 ÷ 2 = 21 486 542 + 1;
- 21 486 542 ÷ 2 = 10 743 271 + 0;
- 10 743 271 ÷ 2 = 5 371 635 + 1;
- 5 371 635 ÷ 2 = 2 685 817 + 1;
- 2 685 817 ÷ 2 = 1 342 908 + 1;
- 1 342 908 ÷ 2 = 671 454 + 0;
- 671 454 ÷ 2 = 335 727 + 0;
- 335 727 ÷ 2 = 167 863 + 1;
- 167 863 ÷ 2 = 83 931 + 1;
- 83 931 ÷ 2 = 41 965 + 1;
- 41 965 ÷ 2 = 20 982 + 1;
- 20 982 ÷ 2 = 10 491 + 0;
- 10 491 ÷ 2 = 5 245 + 1;
- 5 245 ÷ 2 = 2 622 + 1;
- 2 622 ÷ 2 = 1 311 + 0;
- 1 311 ÷ 2 = 655 + 1;
- 655 ÷ 2 = 327 + 1;
- 327 ÷ 2 = 163 + 1;
- 163 ÷ 2 = 81 + 1;
- 81 ÷ 2 = 40 + 1;
- 40 ÷ 2 = 20 + 0;
- 20 ÷ 2 = 10 + 0;
- 10 ÷ 2 = 5 + 0;
- 5 ÷ 2 = 2 + 1;
- 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.
11 001 109 972(10) = 10 1000 1111 1011 0111 1001 1101 1101 0100(2)
3. Determine the signed binary number bit length:
The base 2 number's actual length, in bits: 34.
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, 34,
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.
Number 11 001 109 972(10), a signed integer number (with sign), converted from decimal system (from base 10) and written as a signed binary in two's complement representation:
11 001 109 972(10) = 0000 0000 0000 0000 0000 0000 0000 0010 1000 1111 1011 0111 1001 1101 1101 0100
Spaces were used to group digits: for binary, by 4, for decimal, by 3.