Equal prime and composite sums: Difference between revisions
Added Wren
Thundergnat (talk | contribs) (New draft task and Raku example) |
(Added Wren) |
||
Line 62:
209,456,854,921,713 - 5,012,372ⁿᵈ prime sum, 19,786,181ˢᵗ composite sum 968.26 seconds
^C</pre>
=={{header|Wren}}==
Runs quite quickly for Wren (30 seconds) but requires a lot of memory.
<lang ecmascript>import "./math" for Int
import "./sort" for Find
import "/fmt" for Fmt
var limit = 1e8
var c = Int.primeSieve(limit - 1, false)
var compSums = []
var primeSums = []
var csum = 0
var psum = 0
for (i in 2...limit) {
if (c[i]) {
csum = csum + i
compSums.add(csum)
} else {
psum = psum + i
primeSums.add(psum)
}
}
for (i in 0...primeSums.count) {
var ix
if ((ix = Find.first(compSums, primeSums[i])) >= 0) {
Fmt.print("$,19d - $,11r prime sum, $,13r composite sum", primeSums[i], i+1, ix+1)
}
}</lang>
{{out}}
<pre>
10 - 3rd prime sum, 2nd composite sum
1,988 - 33rd prime sum, 51st composite sum
14,697 - 80th prime sum, 147th composite sum
83,292 - 175th prime sum, 361st composite sum
1,503,397 - 660th prime sum, 1,582nd composite sum
18,859,052 - 2,143rd prime sum, 5,699th composite sum
93,952,013 - 4,556th prime sum, 12,821st composite sum
89,171,409,882 - 118,785th prime sum, 403,341st composite sum
9,646,383,703,961 - 1,131,142nd prime sum, 4,229,425th composite sum
209,456,854,921,713 - 5,012,372nd prime sum, 19,786,181st composite sum
</pre>
| |||