PrimeQCertificate[n] gives a certificate that n is prime or that n is composite.
RamanujanTau[n] gives the Ramanujan \[Tau] function \[Tau](n).
Divide
(Built-in Mathematica Symbol) x/y or Divide[x, y] is equivalent to x y^-1.
Modulus
(Built-in Mathematica Symbol) Modulus -> n is an option that can be given in certain algebraic functions to specify that integers should be treated modulo n.
MultiplicativeOrder[k, n] gives the multiplicative order of k modulo n, defined as the smallest integer m such that k^m \[Congruent] 1 mod n. MultiplicativeOrder[k, n, {r_1, ...
PartitionsQ[n] gives the number q (n) of partitions of the integer n into distinct parts.
PolynomialRemainder[p, q, x] gives the remainder from dividing p by q, treated as polynomials in x.
Prime
(Built-in Mathematica Symbol) Prime[n] gives the n\[Null]^th prime number.
Primes
(Built-in Mathematica Symbol) Primes represents the domain of prime numbers, as in x \[Element] Primes.
Compile
(Built-in Mathematica Symbol) Compile[{x_1, x_2, ...}, expr] creates a compiled function that evaluates expr assuming numerical values of the x_i. Compile[{{x_1, t_1}, ...}, expr] assumes that x_i is of a ...