Table of Contents

## Is long double 128-bit?

With the GNU C Compiler, long double is 80-bit extended precision on x86 processors regardless of the physical storage used for the type (which can be either 96 or 128 bits), On some other architectures, long double can be double-double (e.g. on PowerPC) or 128-bit quadruple precision (e.g. on SPARC).

## How many values can be represented by 128 bits?

The 128-bit data type can handle up to 31 significant digits (compared to 17 handled by the 64-bit long double).

**What is a 128-bit number called?**

Quadruple precision

Quadruple precision (128-bit) floating-point numbers can store 113-bit fixed-point numbers or integers accurately without losing precision (thus 64-bit integers in particular). Quadruple precision floats can also represent any position in the observable universe with at least micrometer precision.

### How many bits is a long double?

Data Types and Sizes

Type Name | 32–bit Size | 64–bit Size |
---|---|---|

float | 4 bytes | 4 bytes |

double | 8 bytes | 8 bytes |

long double | 16 bytes | 16 bytes |

### What is size of long double?

Windows 64-bit applications

Name | Length |
---|---|

float | 4 bytes |

double | 8 bytes |

long double | 8 bytes |

pointer | 8 bytes Note that all pointers are 8 bytes. |

**What is a 128-bit encryption?**

128-bit AES encryption refers to the process of concealing plaintext data using an AES key length of 128 bits. 128-bit AES encryption uses 10 transformation rounds to convert plaintext into ciphertext and is approved by the National Security Agency (NSA) to protect secret but not top-secret government information.

#### What’s the difference between 128-bit and 256-bit video cards?

This is calculated by dividing the bitrate by 8 to convert it to bytes, then multiplying the result by the RAM’s frequency in megahertz. For example, a 128-bit graphics card with 3,000-MHz RAM has 48 GB/s of bandwidth. All other things being equal, a 256-bit card has double that amount, or 96 GB/s.

#### What’s the difference between 64-bit and 128-bit?

so a 64 bit card can do 64 bits on a clock cycle a 128 bit can do twice as much per the same clock cycle. so if you had two gpu with the same gpu chip but one was 64 bit and the other had 128 bit bus the card with the larger bus would be faster.

**How many bits is a long long?**

Table 3-2 Sizes and Ranges of Data Types

Type | Size | Range |
---|---|---|

Integral Types | ||

long int , or signed long int (OpenVMS) | 32 bits | – 2147483648 to 2147483647 |

long int , or signed long int (Digital UNIX) | 64 bits | – 9223372036854775808 to 9223372036854775807 |

unsigned long int (OpenVMS) | 32 bits | 0 to 4294967295 |