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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(1)