mirror of
https://github.com/lcn2/calc.git
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91991bb729
Fixed a mistake in "help intro" where some inserted text
changed the value of "." and thus made the next result
incorrect.
Clarified in "help factor" that 1 is returned if no
factor below the limit was found.
Removed Makefile variable ${MAKEFILE_REV}.
The missing cscript/square.calc file has been restored.
Fixed compiler errors and warnings related to GCC.
In particular, gcc/9.3.1 and gcc/10.2.1 now compile
calc without any compiler errors or warnings,
even with -Werror -Wextra -pedantic.
To print out information about the calc compliation
environment, we added the following make rule:
make calcinfo
Improved how 'make debug' operates.
Moved help/contrib to CONTRIB-CODE. The help/contrib file
is now build from a copy of CONTRIB-CODE.
Created a new calc bug report Email address. Created a new calc
question Email address. Created a new calc contribution Email
address. See the BUGS file for details.
Added "help questions" to print the QUESIONS help file.
If the environment variable $CALCHELP is defined and is non-empty,
then calc help files will be in the direcgory by the $CALCHISTFILE
environment variable.
If the environment variable $CALCCUSTOMHELP is defined and is
non-empty, then custom calc help files will be in the direcgory
by the $CALCCUSTOMHELP environment variable.
The calc-tester mailing list has been retired. See:
* How to submit a calc bug report:
http://www.isthe.com/chongo/tech/comp/calc/calc-bugrept.html
* How to contribute code to calc:
http://www.isthe.com/chongo/tech/comp/calc/calc-contrib.html
* How to submit a question about calc:
http://www.isthe.com/chongo/tech/comp/calc/calc-question.html
75 lines
1.9 KiB
Plaintext
75 lines
1.9 KiB
Plaintext
NAME
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pmodm127 - calculate q mod 2^(2^127-1)
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SYNOPSIS
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custom("pmodm127", q)
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TYPES
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q int > 0
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return int
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DESCRIPTION
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This custom function will return the value:
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q mod 2^(2^127-1)
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This custom function serves as a demonstration of how to write
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a custom function. It performs the equivalent of:
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pmod(2, 2^127-1, q)
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The return value is integer in the half open range: [0, q).
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SPECIAL NOTE:
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Can you find a value, q, for which this custom function returns 1?
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If you do, send the value of q to chongo using the Email address
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found at:
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http://www.isthe.com/chongo/address.html
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EXAMPLE
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> custom("pmodm127", 65537)
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32769
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> custom("pmodm127", 2^31-1)
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8
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> custom("pmodm127", 7^51+2)
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11228202966269457258557496419097462731193173
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LIMITS
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calc must be built with ALLOW_CUSTOM= -DCUSTOM
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calc must be executed with a -C arg.
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q must be an integer > 0
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LIBRARY
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none
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SEE ALSO
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custom
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## Copyright (C) 2004,2021 Landon Curt Noll
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##
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## Calc is open software; you can redistribute it and/or modify it under
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## the terms of the version 2.1 of the GNU Lesser General Public License
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## as published by the Free Software Foundation.
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##
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## Calc is distributed in the hope that it will be useful, but WITHOUT
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## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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## or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
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## Public License for more details.
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##
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## A copy of version 2.1 of the GNU Lesser General Public License is
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## distributed with calc under the filename COPYING-LGPL. You should have
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## received a copy with calc; if not, write to Free Software Foundation, Inc.
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## 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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##
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## Under source code control: 2004/02/25 07:13:15
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## File existed as early as: 2004
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##
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## chongo <was here> /\oo/\ http://www.isthe.com/chongo/
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## Share and enjoy! :-) http://www.isthe.com/chongo/tech/comp/calc/
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