primeutils

A collection of prime number related utilities in a single command-line executable written in Rust.

Usage: (1) primeutils INTEGER [OPTIONS] - Prime checking and factoring
       (2) primeutils --gen [OPTIONS]   - Prime generation
    
       (1) OPTIONS can be the following:
              -c    Check INTEGER for compositeness
              -a    Print the closest prime above INTEGER
              -b    Print the closest prime below INTEGER
              -f    Print the prime factorization of INTEGER
              -e    Print everything
              -h    Display this help screen
       (2) OPTIONS can be the following:
              --min=INT Set the lower limit to use
              --max=INT Set the upper limit to use
    
If options are omitted in (1), -c is automatically assumed
If options are omitted in (2), the limits will be set
to 2 and 2^32-1

The two usage options are mutually exclusive. With both
specified, only the prime generating will be executed

The upper range of the accepted numbers is 2³²-1.

Building

For building, you need to have Rust and Cargo installed. After that, you can run cargo build --release to build for your current platform, or run ./autobuild.sh, which will try to build it for both 32-bit and 64-bit versions of both Windows and Linux. For the script to work, you need to set up separate compilers for all four versions, and you need the strip GNU Coreutils command, which decreases the binary sizes significantly.

Alternatively, you can find prebuilt binaries under the 'Releases' tab for those four platforms.