De Polignac numbers: Difference between revisions
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The 10,000th: 273421
</pre>
=={{header|Julia}}==
* Needs Primes.jl
<syntaxhighlight lang="julia">
using Primes
using Printf
function isdepolignac(n::Integer)
iseven(n) && return false
twopows = Iterators.map(x -> 2^x, 0:floor(Int, log2(n)))
return !any(twopows) do twopow
isprime(n - twopow)
end
end
function depolignacs()
naturals = Iterators.countfrom()
return Iterators.filter(isdepolignac, naturals)
end
for (i, dep) in Iterators.enumerate(depolignacs())
if i == 1
println("The first 50 de Polignac numbers:")
end
if i <= 50
@printf "%4d" dep
i % 10 == 0 ? println() : print(" ")
end
if i == 50
println()
end
if i == 1000
println("The 1000th de Polignac number is $dep")
println()
end
if i == 10000
println("The 10000th de Polignac number is $dep")
break
end
end
</syntaxhighlight>
<pre>
The first 50 de Polignac numbers:
1 127 149 251 331 337 373 509 599 701
757 809 877 905 907 959 977 997 1019 1087
1199 1207 1211 1243 1259 1271 1477 1529 1541 1549
1589 1597 1619 1649 1657 1719 1759 1777 1783 1807
1829 1859 1867 1927 1969 1973 1985 2171 2203 2213
The 1000th de Polignac number is 31941
The 10000th de Polignac number is 273421
</pre>
=={{header|Perl}}==
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