factor(6)
NAME
factor, primes - factor a number, generate primes
SYNOPSIS
factor [number ...] primes [start [stop]]
DESCRIPTION
- The factor utility will factor integers between -2147483648
- and
2147483647 inclusive. When a number is factored, it is - printed, followed
by a ``'', and the list of factors on a single line. Fac - tors are listed
in ascending order, and are preceded by a space. If a fac - tor divides a
value more than once, it will be printed more than once. - When factor is invoked with one or more arguments, each ar
- gument will be
factored. - When factor is invoked with no arguments, factor reads num
- bers, one per
line, from standard input, until end of file or error. - Leading whitespace and empty lines are ignored. Numbers may be preceded
- by a single or +. Numbers are terminated by a non-digit character (such
- as a new
line). After a number is read, it is factored. Input lines - must not be
longer than 255 characters. - The primes utility prints primes in ascending order, one per
- line, start
ing at or above start and continuing until, but not includ - ing stop. The
start value must be at least 0 and not greater than stop. - The stop value
must not be greater than 4294967295. The default value of - stop is
4294967295. - When the primes utility is invoked with no arguments, start
- is read from
standard input. stop is taken to be 4294967295. The start - value may be
preceded by a single +. The start value is terminated by a - non-digit
character (such as a newline). The input line must not be - longer than
255 characters.
DIAGNOSTICS
- Out of range or invalid input results in `ouch' being writ
- ten to standard
error.
BUGS
- factor cannot handle the ``10 most wanted'' factor list,
- primes won't get
you a world record. - BSD May 31, 1993