FactorTermsList[poly] gives a list in which the first element is the overall numerical factor in poly, and the second element is the polynomial with the overall factor ...

FactorTerms[poly] pulls out any overall numerical factor in poly. FactorTerms[poly, x] pulls out any overall factor in poly that does not depend on x. FactorTerms[poly, {x_1, ...

FindList["file", " text"] gives a list of lines in the file that contain the specified string. FindList["file", {"text_1", "text_2", ...}] gives a list of all lines that ...

Find[stream, " text"] finds the first line in an input stream that contains the specified string. Find[stream, {"text_1", "text_2", ...}] finds the first line that contains ...

FindSettings -> {opt_1 -> val_1, opt_2 -> val_2, ...} is a global option that specifies settings for the Find dialog box.

FormatType is an option for output streams, graphics, and functions such as Text that specifies the default format type to use when outputting expressions.

FreeQ[expr, form] yields True if no subexpression in expr matches form, and yields False otherwise. FreeQ[expr, form, levelspec] tests only those parts of expr on levels ...

FullDefinition[symbol] prints as the definitions given for symbol, and all symbols on which these depend.

GaussianIntegers is an option for FactorInteger, PrimeQ, Factor, and related functions that specifies whether factorization should be done over Gaussian integers.

HammingDistance[u, v] gives the Hamming distance between strings or vectors u and v.