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Top Forums UNIX for Beginners Questions & Answers How do I use grep to grab prime number output from my factor program? Post 302985139 by Scrutinizer on Sunday 6th of November 2016 07:25:54 AM
Old 11-06-2016
Two more options :
Code:
| grep '= [^ ]*$'

Code:
| awk NF==3

(but my favourite would be RudiC's approach)
--
Edit as disdeorgue correctly remarked the would not with for square numbers..
So adjusting for that, the first one becomes :
Code:
| grep '= [^ ^]*$'

or
Code:
| grep '= [0-9]*$'


Last edited by Scrutinizer; 11-06-2016 at 12:42 PM..
 

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PRIME(1SSL)							      OpenSSL							       PRIME(1SSL)

NAME
openssl-prime, prime - compute prime numbers SYNOPSIS
openssl prime [-help] [-hex] [-generate] [-bits] [-safe] [-checks] [number...] DESCRIPTION
The prime command checks if the specified numbers are prime. If no numbers are given on the command line, the -generate flag should be used to generate primes according to the requirements specified by the rest of the flags. OPTIONS
[-help] Display an option summary. [-hex] Generate hex output. [-generate] Generate a prime number. [-bits num] Generate a prime with num bits. [-safe] When used with -generate, generates a "safe" prime. If the number generated is n, then check that (n-1)/2 is also prime. [-checks num] Perform the checks num times to see that the generated number is prime. The default is 20. COPYRIGHT
Copyright 2017 The OpenSSL Project Authors. All Rights Reserved. Licensed under the OpenSSL license (the "License"). You may not use this file except in compliance with the License. You can obtain a copy in the file LICENSE in the source distribution or at <https://www.openssl.org/source/license.html>. 1.1.1a 2018-12-18 PRIME(1SSL)
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