How to convert the base ten signed integer number 1 000 110 374 to base two:
- 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.
To convert a base ten signed number (written as an integer in decimal system) to base two, written as a signed binary, follow the steps below.
- Divide the number repeatedly by 2: keep track of each remainder.
- Stop when you get a quotient that is equal to zero.
- Construct the base 2 representation of the positive number: take all the remainders starting from the bottom of the list constructed above.
- Determine the signed binary number bit length.
- Get the binary computer representation: if needed, add extra 0s in front (to the left) of the base 2 number, up to the required length and change the first bit (the leftmost), from 0 to 1, if the number is negative.
- Below you can see the conversion process to a signed binary and the related calculations.
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;
- 1 000 110 374 ÷ 2 = 500 055 187 + 0;
- 500 055 187 ÷ 2 = 250 027 593 + 1;
- 250 027 593 ÷ 2 = 125 013 796 + 1;
- 125 013 796 ÷ 2 = 62 506 898 + 0;
- 62 506 898 ÷ 2 = 31 253 449 + 0;
- 31 253 449 ÷ 2 = 15 626 724 + 1;
- 15 626 724 ÷ 2 = 7 813 362 + 0;
- 7 813 362 ÷ 2 = 3 906 681 + 0;
- 3 906 681 ÷ 2 = 1 953 340 + 1;
- 1 953 340 ÷ 2 = 976 670 + 0;
- 976 670 ÷ 2 = 488 335 + 0;
- 488 335 ÷ 2 = 244 167 + 1;
- 244 167 ÷ 2 = 122 083 + 1;
- 122 083 ÷ 2 = 61 041 + 1;
- 61 041 ÷ 2 = 30 520 + 1;
- 30 520 ÷ 2 = 15 260 + 0;
- 15 260 ÷ 2 = 7 630 + 0;
- 7 630 ÷ 2 = 3 815 + 0;
- 3 815 ÷ 2 = 1 907 + 1;
- 1 907 ÷ 2 = 953 + 1;
- 953 ÷ 2 = 476 + 1;
- 476 ÷ 2 = 238 + 0;
- 238 ÷ 2 = 119 + 0;
- 119 ÷ 2 = 59 + 1;
- 59 ÷ 2 = 29 + 1;
- 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.
1 000 110 374(10) = 11 1011 1001 1100 0111 1001 0010 0110(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) 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, 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:
Number 1 000 110 374(10), a signed integer number (with sign),
converted from decimal system (from base 10)
and written as a signed binary (in base 2):
1 000 110 374(10) = 0011 1011 1001 1100 0111 1001 0010 0110
Spaces were used to group digits: for binary, by 4, for decimal, by 3.