GMP is a new dependency.

CMakeLists.txt

@@ -9,7 +9,12 @@ if(NOT CMAKE_BUILD_TYPE)
 	set(CMAKE_BUILD_TYPE Debug)
 endif()
 
+set(CMAKE_MODULE_PATH
+	${CMAKE_MODULE_PATH}
+	${CMAKE_SOURCE_DIR}/cmake/)
+
 find_package(OpenMP REQUIRED)
+find_package(GMP REQUIRED)
 
 set(SRCS
     src/Main.cpp)

cmake/FindGMP.cmake

@@ -0,0 +1,24 @@
+# SOURCE: http://stackoverflow.com/questions/29307862/error-linking-gmp-library
+set(GMP_PREFIX "" CACHE PATH "path ")
+
+find_path(GMP_INCLUDE_DIR gmp.h gmpxx.h
+	PATHS ${GMP_PREFIX}/include /usr/include /usr/local/include )
+
+find_library(GMP_LIBRARY NAMES gmp libgmp
+	PATHS ${GMP_PREFIX}/lib /usr/lib /usr/local/lib)
+
+
+if(GMP_INCLUDE_DIR AND GMP_LIBRARY)
+	get_filename_component(GMP_LIBRARY_DIR ${GMP_LIBRARY} PATH)
+	set(GMP_FOUND TRUE)
+endif()
+
+if(GMP_FOUND)
+	if(NOT GMP_FIND_QUIETLY)
+		MESSAGE(STATUS "Found GMP: ${GMP_LIBRARY}")
+	endif()
+else()
+	if(GMP_FIND_REQUIRED)
+		message(FATAL_ERROR "Could not find GMP")
+	endif()
+endif()