bignum and parenthesis

Anonymous Monk has asked for the wisdom of the Perl Monks concerning the following question:

 
for __ in $$; do 

        perl -Mbignum -le  'print    7 ** 127  %    524287 '

        perl -Mbignum -le  'print ( 7 ** 127 ) % ( 524287 )' 

        echo ' ( 7 ^ 127 ) % 524287 ' | bc 

done | gcat -b


     1    102010

     2    212545092456801670844330383105896224333193816736399849985499
+757869483902203328714236393937418376186556719543

     3    102010
[download]

How come adding parenthesis screws up the calculation here ? The middle one simply outputted 7 ** 127 without modulating it down

The equation being tested is Mersenne Primes

    ( M3 ** M7 ) mod M19

Thanks.

perl -V
Summary of my perl5 (revision 5 version 36 subversion 1) configuration
+:
   
  Platform:
    osname=darwin
    osvers=22.4.0
    archname=darwin-thread-multi-2level
    uname='darwin ventura-arm64.local 22.4.0 darwin kernel version 22.
+4.0: mon mar 6 20:55:35 pst 2023; root:xnu-8796.101.5~3release_arm64_
+vmapple arm64 '
[download]

Comment on bignum and parenthesis Select or Download Code

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Re: bignum and parenthesis by tybalt89 (Monsignor) on Jul 03, 2023 at 18:11 UTC
Use `perl -Mbignum -le 'print +( 7 ** 127 ) % ( 524287 )'` [download] See beginning of perlfunc for reason.	[reply] [d/l]
Re^2: bignum and parenthesis by NERDVANA (Priest) on Jul 03, 2023 at 18:35 UTC
Reading the documentation is a good recommendation, but to spell it out quickly, print is a function, not a keyword, and perl functions have optional parentheses around the arguments.	[reply]
Re^3: bignum and parenthesis by Anonymous Monk on Jul 03, 2023 at 20:18 UTC
"Reading the documentation is a good recommendation, but to spell it out quickly, print is a function, not a keyword, and perl functions have optional parentheses around the arguments." then what does the parser think the modulo and number is doing there? from my trial and error it seems it's trying to do modulo using the return value of print function ( = "1" ) , which is a very odd way to interpret such a syntax, since there's no subsequent action to further process that info, store it in a variable, or output to the pipe / to file.	[reply]
Re^4: bignum and parenthesis by pryrt (Abbot) on Jul 03, 2023 at 21:03 UTC
Re^5: bignum and parenthesis by kcott (Archbishop) on Jul 08, 2023 at 08:05 UTC
Re^4: bignum and parenthesis by AnomalousMonk (Archbishop) on Jul 04, 2023 at 19:24 UTC
Re^4: bignum and parenthesis by Anonymous Monk on Jul 03, 2023 at 20:26 UTC
Re^5: bignum and parenthesis by tybalt89 (Monsignor) on Jul 04, 2023 at 05:06 UTC
Re^2: bignum and parenthesis by Dallaylaen (Chaplain) on Jul 16, 2023 at 20:15 UTC
Oh that's why! Of course, `perl -wle '...'` catches it. Yay warnings!	[reply]