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<title>factor(1) - Plan 9 from User Space</title>
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<tr><td width=20><td><b>FACTOR(1)</b><td align=right><b>FACTOR(1)</b>
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<p><font size=+1><b>NAME </b></font><br>
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factor, primes – factor a number, generate large primes<br>
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<p><font size=+1><b>SYNOPSIS </b></font><br>
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<tt><font size=+1>factor</font></tt> [ <i>number</i> ]
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<tt><font size=+1>primes</font></tt> [ <i>start</i> [ <i>finish</i> ] ]<br>
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<p><font size=+1><b>DESCRIPTION </b></font><br>
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<i>Factor</i> prints <i>number</i> and its prime factors, each repeated the
proper number of times. The number must be positive and less than
254 (about 1.8×1016).
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If no <i>number</i> is given, <i>factor</i> 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 <i>-/n </i>.
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<i>Primes</i> prints the prime numbers ranging from <i>start</i> to <i>finish</i>,
where <i>start</i> and <i>finish</i> are positive numbers less than 256. If
<i>finish</i> is missing, <i>primes</i> prints without end; if <i>start</i> is missing,
it reads the starting number from the standard input.<br>
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<p><font size=+1><b>SOURCE </b></font><br>
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<tt><font size=+1>/usr/local/plan9/src/cmd/factor.c<br>
/usr/local/plan9/src/cmd/primes.c<br>
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