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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 302985074 by steezuschrist96 on Friday 4th of November 2016 01:27:14 PM
Old 11-04-2016
Question How do I use grep to grab prime number output from my factor program?

I have a factor program that runs and outputs to stdout all the prime numbers that are specified in the given paramters, in this case 30000000-31000000.

Command:
Code:
factor/factor 30000000-31000000

Sample output:
Code:
30999979 = 30999979
30999980 = 2^2 5 11 140909
30999981 = 3 10333327
30999982 = 2 13 19 62753
30999983 = 7 1663 2663
30999984 = 2^4 3 645833
30999985 = 5 29 439 487
30999986 = 2 293 52901
30999987 = 3^2 3444443
30999988 = 2^2 7749997
30999989 = 30999989
30999990 = 2 3 5 7 43 3433
30999991 = 11 2818181
30999992 = 2^3 163 23773
30999993 = 3 17 607843
30999994 = 2 15499997
30999995 = 5 13 79 6037
30999996 = 2^2 3^6 10631
30999997 = 7^3 90379
30999998 = 2 23 151 4463
30999999 = 3 10333333
31000000 = 2^6 5^6 31

How would I use a pipeline and grep to just grab the prime numbers:
Code:
factor/factor 30000000-31000000 | grep

For example Output:
Code:
30999979 = 30999979
30999989 = 30999989

 

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Locale::Codes::LangExt(3pm)				 Perl Programmers Reference Guide			       Locale::Codes::LangExt(3pm)

NAME
Locale::Codes::LangExt - standard codes for language extension identification SYNOPSIS
use Locale::Codes::LangExt; $lext = code2langext('acm'); # $lext gets 'Mesopotamian Arabic' $code = langext2code('Mesopotamian Arabic'); # $code gets 'acm' @codes = all_langext_codes(); @names = all_langext_names(); DESCRIPTION
The "Locale::Codes::LangExt" module provides access to standard codes used for identifying language extensions, such as those as defined in the IANA language registry. Most of the routines take an optional additional argument which specifies the code set to use. If not specified, the default IANA language registry codes will be used. SUPPORTED CODE SETS
There are several different code sets you can use for identifying language extensions. A code set may be specified using either a name, or a constant that is automatically exported by this module. For example, the two are equivalent: $lext = code2langext('acm','alpha'); $lext = code2langext('acm',LOCALE_LANGEXT_ALPHA); The codesets currently supported are: alpha This is the set of three-letter (lowercase) codes from the IANA language registry, such as 'acm' for Mesopotamian Arabic. This is the default code set. ROUTINES
code2langext ( CODE [,CODESET] ) langext2code ( NAME [,CODESET] ) langext_code2code ( CODE ,CODESET ,CODESET2 ) all_langext_codes ( [CODESET] ) all_langext_names ( [CODESET] ) Locale::Codes::LangExt::rename_langext ( CODE ,NEW_NAME [,CODESET] ) Locale::Codes::LangExt::add_langext ( CODE ,NAME [,CODESET] ) Locale::Codes::LangExt::delete_langext ( CODE [,CODESET] ) Locale::Codes::LangExt::add_langext_alias ( NAME ,NEW_NAME ) Locale::Codes::LangExt::delete_langext_alias ( NAME ) Locale::Codes::LangExt::rename_langext_code ( CODE ,NEW_CODE [,CODESET] ) Locale::Codes::LangExt::add_langext_code_alias ( CODE ,NEW_CODE [,CODESET] ) Locale::Codes::LangExt::delete_langext_code_alias ( CODE [,CODESET] ) These routines are all documented in the Locale::Codes::API man page. SEE ALSO
Locale::Codes The Locale-Codes distribution. Locale::Codes::API The list of functions supported by this module. http://www.iana.org/assignments/language-subtag-registry The IANA language subtag registry. AUTHOR
See Locale::Codes for full author history. Currently maintained by Sullivan Beck (sbeck@cpan.org). COPYRIGHT
Copyright (c) 2011-2013 Sullivan Beck This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself. perl v5.18.2 2013-11-04 Locale::Codes::LangExt(3pm)
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