source code
# The Computer Language Benchmarks Game
# https://salsa.debian.org/benchmarksgame-team/benchmarksgame/
#
# contributed by Robert Bradshaw
# modified by Ruud H.G.van Tol
# modified by Emanuele Zeppieri
use strict;
use Math::BigInt lib => 'GMP';
die 'Math::BigInt::GMP missing!'
if Math::BigInt->config->{lib} ne 'Math::BigInt::GMP';
my $z0 = Math::BigInt->new(1);
my $z1 = Math::BigInt->new(0);
my $z2 = Math::BigInt->new(1);
sub extract_digit { return scalar( ($z0 * $_[0] + $z1) / $z2 ) }
sub compose {
if ( defined $_[3] ) {
$z1->bmul( $_[0] )->badd( $_[1] * $z2 )
} else {
$z1->bmul( $_[2] )->badd( $_[1] * $z0 )
}
$z0->bmul( $_[0] );
$z2->bmul( $_[2] );
return
}
my $n = $ARGV[0];
($,, $\) = ("\t", "\n");
my ($i, $s, $d); my $k = 0;
# main loop
for $i (1..$n) {
while (
$z0->bcmp($z2) == 1 || ( $d = extract_digit(3) ) != extract_digit(4)
) {
# y not safe
$k++; compose($k, 4*$k+2, 2*$k+1)
}
compose(10, -10*$d, 1, 1);
$s .= $d;
unless ( $i % 10 ) { print $s, ":$i"; undef $s }
}
$s .= ' ' x (10-$i) if $i = $n % 10;
print $s, ":$n" if $s
notes, command-line, and program output
NOTES:
64-bit Ubuntu quad core
This is perl 5, version 40
subversion 0 (v5.40.0)
x86_64-linux-thread-multi
Mon, 10 Jun 2024 22:53:40 GMT
COMMAND LINE:
/opt/src/perl-5.40.0/bin/perl pidigits.perl 10000
(TRUNCATED) PROGRAM OUTPUT:
3141592653 :10
5897932384 :20
6264338327 :30
9502884197 :40
1693993751 :50
0582097494 :60
4592307816 :70
4062862089 :80
9862803482 :90
5342117067 :100
9821480865 :110
1328230664 :120
7093844609 :130
5505822317 :140
2535940812 :150
8481117450 :160
2841027019 :170
3852110555 :180
9644622948 :190
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6442881097 :210
5665933446 :220
1284756482 :230
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5271201909 :250
1456485669 :260
2346034861 :270
0454326648 :280
2133936072 :290
6024914127 :300
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6063155881 :320
7488152092 :330
0962829254 :340
0917153643 :350
6789259036 :360
0011330530 :370
5488204665 :380
2138414695 :390
1941511609 :400
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0864034418 :730
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