2.10 exercise 2.10 source file and exercise 2.10 matrix file
2.11 exercise 2.11 lfsr bits,
The following are some "basic number" programs that I have written and used over the years. No guarantee that they still work or that they have been bulletproofed in any way.
simple idiot factoring program
main prog for extended euclidm
simple gmp program, its makefile, and its output (except for the intermediate results that would give away the answer)