Erdős-primes: Difference between revisions
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999721 is Erdos prime 7875
</pre>
=={{header|APL}}==
<syntaxhighlight lang="apl">erdos_primes←{
prime ← {(⍵≥2) ∧ 0∧.≠(1↓⍳⌊⍵*÷2)|⍵}
erdos ← {(prime ⍵) ∧ ∧/~prime¨ ⍵-!⍳⌊(!⍣¯1)⍵}
e2500 ← (erdos¨e)/e←⍳2500
⎕←e2500
⎕←'There are ',(⍕⍴e2500),' Erdős numbers ≤ 2500'
}</syntaxhighlight>
{{out}}
<pre>2 101 211 367 409 419 461 557 673 709 769 937 967 1009 1201 1259 1709 1831 1889 2141 2221 2309 2351 2411 2437
There are 25 Erdős numbers ≤ 2500</pre>
=={{header|Arturo}}==
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