NAME

       factor, primes - factor a number, generate large primes

SYNOPSIS

       factor [ number ]

       primes [ start [ finish ] ]

DESCRIPTION

       Factor prints number and its prime factors, each repeated the proper number of times.  The number must be
       positive and less than 2**54 (about 1.8e16)

       If no number is given, factor reads a stream of numbers from the standard input  and  factors  them.   It
       exits on any input not a positive integer.  Maximum running time is proportional to sqrt(n).

       Primes prints the prime numbers ranging from start to finish, where start and finish are positive numbers
       less than 2**56.  If finish is missing, primes prints without end; if start  is  missing,  it  reads  the
       starting number from the standard input.

SOURCE

       /src/cmd/factor.c
       /src/cmd/primes.c

                                                                                                  FACTOR(1plan9)