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richmond62,

How did you do it (making a link)?

Nelson

SparkOut,

The array thing is over my head and this project isn't important enough to learn it (arrays) at the present.

The second code is 10 times faster than the first--yes, hours to minutes.

I'm assuming the counting thing is always from the beginning and most of the duplicates are at the ...

Repeat with zz=the number of lines of Big down to 1 --delete duplicates
if line zz of Big=line zz-1 of Big then delete line zz-1 of Big
end Repeat

put empty into zz
repeat forever --delete duplicates
add 1 to zz
if zz=the number of lines of Big then exit repeat
repeat forever
if line zz of ...

My iMac usually generates the list in under 10 seconds. A little over 5 million integers, it's kind of astonishing.

But that's all beside the point. How to eliminate duplicates in a similar timely fashion?

on mouseUp
put the milliseconds into timeOn
put empty into fld 1

repeat with xx=2 to 50000
put xx into zz
repeat until zz=1

if zz mod 2 =1 then
put ((zz*3)+1) into zz
put zz &return after BigTemp
else
put zz/2 into zz
put zz &return after BigTemp
end if

end repeat
end repeat ...

I’m generating large sets of integers (millions) which takes just a few seconds and then sorting them numerically (another couple seconds) and then deleting all the multiples which takes hours.

Repeat with zz=the number of lines of BigTemp down to 1 --delete duplicates
if line zz of BigTemp=line ...