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NAME
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factor, primes – factor a number, generate large primes
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SYNOPSIS
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factor [ number ]
primes [ start [ finish ] ]
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DESCRIPTION
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Factor prints number and its prime factors, each repeated the
proper number of times. The number must be positive and less than
254 (about 1.8×1016).
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 -/n .
Primes prints the prime numbers ranging from start to finish,
where start and finish are positive numbers less than 256. If
finish is missing, primes prints without end; if start is missing,
it reads the starting number from the standard input.
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SOURCE
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