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FACTOR(1)							     FACTOR(1)

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 stan‐
       dard 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
       /sys/src/cmd/factor.c
       /sys/src/cmd/primes.c

								     FACTOR(1)

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