source code
/* The Computer Language Benchmarks Game
https://salsa.debian.org/benchmarksgame-team/benchmarksgame/
contributed by Denis Gribov
based on C source code by Ledhug
js BigInt replaced with gmplib by Andrey Filatkin
un-buffered by Isaac Gouy
*/
const MPZ = require('mpzjs');
const n = +process.argv[2] || 10000;
let i = 0, ns = 0;
let k = 0;
let k2 = 1;
const acc = MPZ(0);
const den = MPZ(1);
const num = MPZ(1);
const tmp = MPZ();
const d3 = MPZ();
const d4 = MPZ();
while (i < n) {
k++;
k2 += 2;
MPZ.addMul(acc, num, 2);
MPZ.mul(acc, acc, k2);
MPZ.mul(den, den, k2);
MPZ.mul(num, num, k);
if (num.gt(acc)) {
continue;
}
MPZ.mul(tmp, num, 3);
MPZ.add(tmp, tmp, acc);
MPZ.div(d3, tmp, den);
MPZ.add(tmp, tmp, num);
MPZ.div(d4, tmp, den);
if (d3.ne(d4)) {
continue;
}
const d = d3.toNumber();
ns = ns * 10 + d;
i++;
let last = i >= n;
if (i % 10 == 0 || last) {
console.log(pad(ns, last) + '\t:' + i);
ns = 0;
}
if (last) break;
MPZ.subMul(acc, den, d);
MPZ.mul(acc, acc, 10);
MPZ.mul(num, num, 10);
}
function pad(i, last) {
var res = i.toString(), count;
count = 10 - res.length;
while (count > 0) {
last ? res += ' ' : res = '0' + res;
count--;
}
return res;
}
notes, command-line, and program output
NOTES:
64-bit Ubuntu quad core
v23.0.0
Tue, 22 Oct 2024 23:52:59 GMT
MAKE:
cp -L pidigits.node-4.node pidigits.js
0.15s to complete and log all make actions
COMMAND LINE:
/opt/src/node-v23.0.0/bin/node pidigits.js 10000
(TRUNCATED) PROGRAM OUTPUT:
3141592653 :10
5897932384 :20
6264338327 :30
9502884197 :40
1693993751 :50
0582097494 :60
4592307816 :70
4062862089 :80
9862803482 :90
5342117067 :100
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1328230664 :120
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5505822317 :140
2535940812 :150
8481117450 :160
2841027019 :170
3852110555 :180
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6442881097 :210
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5271201909 :250
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0454326648 :280
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