FACTOR(C) XENIX System V FACTOR(C)
Name
factor - Factor a number.
Syntax
factor [ number ]
Description
When factor is invoked without an argument, it waits for a
number to be typed in. If you type in a positive number
less than 246 (about 7.2e13) it will factor the number and
print its prime factors; each one is printed the proper
number of times. Then it waits for another number. It
exits if it encounters a zero or any non-numeric character.
If factor is invoked with an argument, it factors the number
as above and then exits.
The time it takes to factor a number, n, is proportional to
sqrt(n). It usually takes longer to factor a prime or the
square of a prime, than to factor other numbers.
Diagnostics
factor returns an error message if the supplied input value
is greater than 246 or is not an integer number.
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