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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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