usr/share/man/cat6/primes.0



FACTOR(6)              BSD Reference Manual             FACTOR(6)


N\bNA\bAM\bME\bE
       factor, primes - factor a number, generate primes

S\bSY\bYN\bNO\bOP\bPS\bSI\bIS\bS
       f\bfa\bac\bct\bto\bor\br [ number ] ...

       p\bpr\bri\bim\bme\bes\bs [ start [ stop ]]

D\bDE\bES\bSC\bCR\bRI\bIP\bPT\bTI\bIO\bON\bN
       The   _\bf_\ba_\bc_\bt_\bo_\br   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.   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  _\bf_\ba_\bc_\bt_\bo_\br  is  invoked with one or more arguments, each
       argument will be factored.

       When _\bf_\ba_\bc_\bt_\bo_\br is invoked with  no  arguments,  _\bf_\ba_\bc_\bt_\bo_\br  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 - or +.
       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 255 characters.

       The _\bp_\br_\bi_\bm_\be_\bs utility prints primes in ascending  order,  one
       per line, starting at or above s\bst\bta\bar\brt\bt and continuing until,
       but not including s\bst\bto\bop\bp.\b.  The s\bst\bta\bar\brt\bt value must be at  least
       0  and  not  greater than s\bst\bto\bop\bp.\b. The s\bst\bto\bop\bp value must not be
       greater than 4294967295.  The default  value  of  s\bst\bto\bop\bp  is
       4294967295.

       When  the  _\bp_\br_\bi_\bm_\be_\bs  utility  is  invoked with no arguments,
       s\bst\bta\bar\brt\bt is read from standard input.  S\bSt\bto\bop\bp is  taken  to  be
       4294967295.   The  s\bst\bta\bar\brt\bt value may be preceded by a single
       +.  The s\bst\bta\bar\brt\bt value is terminated by a non-digit character
       (such  as  a  newline).  The input line must not be longer
       than 255 characters.

D\bDI\bIA\bAG\bGN\bNO\bOS\bST\bTI\bIC\bCS\bS
       Out of range or invalid  input  results  in  `ouch'  being
       written to standard error.

B\bBU\bUG\bGS\bS
       _\bF_\ba_\bc_\bt_\bo_\br  cannot  handle the ``10 most wanted'' factor list,
       _\bp_\br_\bi_\bm_\be_\bs won't get you a world record.


4.4 Berkeley Distribution  May 31, 1993                         1