De Polignac numbers: Difference between revisions
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=={{header|RPL}}==
Polignac really made a fool of himself for all time by writing to the French Academy of Science that he had verified his "theorem" up to 3,000,000. To make the search faster, RPL flag management features (<code>CF</code>, <code>SF
{{works with|Halcyon Calc|4.2.7}}
≪ '''IF''' DUP 5 ≤ '''THEN'''
{ 2 3 5 } SWAP POS SIGN
'''ELSE'''
'''IF''' DUP 2 MOD NOT '''THEN''' 2
DUP √ CEIL → lim
≪ 3
'''WHILE''' DUP2 MOD OVER lim ≤ AND '''REPEAT''' 2 + '''END'''
≫
'''END'''
MOD SIGN
'''END'''
≫ '<span style="color;blue">PRIM?</span>' STO
≪ → n
≪ { 1 } 3
'''DO'''
1 CF
DUP LN 2 LN / FLOOR
'''WHILE''' DUP 0 ≥ 1 FC? AND '''REPEAT'''
2 OVER ^ 3 PICK SWAP -
'''IF''' <span style="color;blue">PRIM?</span> '''THEN''' 1 SF '''END'''
1 -
'''END''' DROP
'''IF''' 1 FC? '''THEN''' DUP ROT SWAP + SWAP '''END'''▼
▲ IF 1 FC? THEN DUP ROT SWAP + SWAP END
2 +
'''UNTIL''' OVER SIZE n == '''END'''
DROP
≫ ≫ '<span style="color;blue">DPFAIL</span>' STO
50 <span style="color;blue">DPFAIL</span>
{{out}}
<pre>
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