FACTOR(6) 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.
NetBSD 6.1.5 May 15, 2010 NetBSD 6.1.5
