PrimeOmega[n] gives the number of prime factors counting multiplicities \[CapitalOmega](n) in n.
PrimePi
(Built-in Mathematica Symbol) PrimePi[x] gives the number of primes \[Pi] (x) less than or equal to x.
PrimeZetaP[s] gives prime zeta function P(s).
PrimitiveRoot[n] gives the smallest primitive root of n.
Prolog
(Built-in Mathematica Symbol) Prolog is an option for graphics functions which gives a list of graphics primitives to be rendered before the main part of the graphics is rendered.
Protect
(Built-in Mathematica Symbol) Protect[s_1, s_2, ...] sets the attribute Protected for the symbols s_i. Protect["form_1", "form_2", ...] protects all symbols whose names match any of the string patterns ...
Pruning
(Built-in Mathematica Symbol) Pruning[image] removes the outermost branches of thin objects in image by setting their values to black.Pruning[image, n] removes branches that are at most n pixels ...
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).
RamanujanTauTheta[t] gives the Ramanujan tau theta function \[Theta](t).