Penholodigital squares: Difference between revisions
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→slightly faster: i meant +400
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-- to get the next square. That does mean we need to be a little smarter displaying progress, though.
-- We can also utilise a partial to avoid overflow and get 16 digits to work properly on 32-bit.
-- We can also skip +199 if that ain't gona work and +
-- We can also use a trivial integer-sized bitmask to check for duplicate digits, which won't hit any
-- problems (on Phix) up to at least 29 digits, or 61 digits on 64-bit, and start off with bitmask=1
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