netbsd man page for factor

FACTOR(6)							 BSD Games Manual							 FACTOR(6)

NAME
     factor -- factor a number

SYNOPSIS
     factor [number ...]

DESCRIPTION
     The factor utility factors integers larger than 1.  When a number is factored, it is printed, followed by a ``:'', and the list of (prime)
     factors on a single line.	Factors are listed in ascending order, and are preceded by a space.  If a factor divides a value more than once,
     it will be printed more than once.

     When factor is invoked with one or more arguments, each argument will be factored.

     When factor is invoked with no arguments, factor reads numbers, one per line, from standard input, until end of file or error.  Leading
     white-space and empty lines are ignored.  Numbers may be preceded by a single +.  Integer less than 2 are rejected.  Numbers are terminated
     by a non-digit character (such as a newline).  After a number is read, it is factored.  Input lines must not be longer than LINE_MAX - 1
     (currently 2047) characters.

     By default, factor is compiled against the OpenSSL bignum implementation openssl_bn(3), which lets it handle arbitrarily large values.  (Note
     however that very large values can take a very long time to factor.) If factor is compiled without OpenSSL it is limited to the maximum value
     of unsigned long.

DIAGNOSTICS
     Out of range or invalid input results in an appropriate error message being written to standard error.

BSD
								   May 15, 2010 							       BSD