Mersenne prime testing done quickly!
Switch branches/tags
Nothing to show
Clone or download
Fetching latest commit…
Cannot retrieve the latest commit at this time.
Failed to load latest commit information.


Mersenne prime testing done quickly!






Run stemprime $number to test whether 2^$number-1 is prime.

Run stemprime --help to view usage and help info

Run stemprime N0 N1 N2 N3 ... to test a series of exponents, in parallel (i.e. stemprime 31 67 127 128 would test 2^31-1, 2^67-1, 2^127-1, and 2^128-1).


Option Takes Function
--info N/A Prints version and name info about the program
-h, --help N/A Prints help and usage information
--authors N/A Prints authors name and email addresses
-v=2 number Sets verbosity level (3 prints all, 0 is only neccesary info)
-d=./ string Where to store and restore from progress files
-nc, --no-checkpoint N/A If enabled, no checkpoint files are used
-t, --time-interval=10000 number Prints each t iterations
number The exponent to perform LL test on M n


Release (downloaded)

Run ./configure && make && make install

Run stemprime --help to view the help info.

An example usage would be like: stemprime 31 to test 2^31-1

Development (source)

You will need autotools, GMP, , and pthreads.

Then, run autoconf -i.

And, finally, install like any other.

i.e. ./configure && make

The binary is ./src/stemprime

Configure Options

Option Description Note
--enable-static Builds a static executable (for distributing) Doesn't always work on macOS
--with-X=XDIR Gives info for finding library X in XDIR See the next section

Non Standard Locations

If you have installed GMP, cargs, or pthreads in a non standard location, you can modify the configure step like so:

./configure --with-gmp=GMPDIR --with-cargs=CARGSDIR ...

GMPDIR should be what you set --prefix while configuring GMP, CARGSDIR should be what you set --prefix to while configuring cargs, etc.

Then, run make like the examples give, and you should be good!