factor, primes \- factor a number, generate large primes
is invoked without an argument, it waits for a number to be typed in.
If you type in a positive
number less than 2\u\s756\s0\d (about
.if t 7.2\(mu10\u\s716\s0\d\|)
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.
is invoked with an argument, it factors the number
Maximum time to factor is proportional to
.if t \(sr\o'\fIn\fR\(rn'
or the square of a prime.
It takes 1 minute to factor a prime
is invoked, it waits for a number to be typed in.
If you type in a positive
number less than 2\u\s756\s0\d
it will print all primes greater than or
`Ouch.' for input out of range or for garbage input.