math/R-cran-numbers/pkg-descr

   1 Provides number-theoretic functions for factorization, prime numbers,
   2 twin primes, primitive roots, modular logarithm and inverses, extended
   3 GCD, Farey series and continuous fractions. Includes Legendre and Jacobi
   4 symbols, some divisor functions, Euler's Phi function, etc.
   5
   6 WWW: https://cran.r-project.org/web/packages/numbers/