PermutationMax[perm] returns the largest integer moved by the permutation perm.
PermutationPower[perm, n] gives the n\[Null]^th permutation power of the permutation perm.
PermutationSupport[perm] returns the support of the permutation perm.
PowersRepresentations[n, k, p] gives the distinct representations of the integer n as a sum of k non-negative p\[Null]^th integer powers.
PrimeNu
(Built-in Mathematica Symbol) PrimeNu[n] gives the number of distinct primes \[Nu](n) in n.
PrimeOmega[n] gives the number of prime factors counting multiplicities \[CapitalOmega](n) in n.
PrimeZetaP[s] gives prime zeta function P(s).
PrimitiveRoot[n] gives the smallest primitive root of n.
QFactorial[n, q] gives the q-factorial [n] q!.
QGamma
(Built-in Mathematica Symbol) QGamma[z, q] gives the q-gamma function \[CapitalGamma]_q (z).