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Roman palindrome (Posted on 2015-04-07) Difficulty: 2 of 5
What is the largest palindrome in Roman representation of numerals?

See The Solution Submitted by Ady TZIDON    
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Depending on what's allowed. | Comment 1 of 3
Simplest answer may be 3000: MMM or 4000: MMMM?

Wikipedia mentions the use of a horizontal overline to multiply by a thousand.  Thus 4006: IVVI.  Is this a palindrome?  But then I suppose M would be 1000000 etc.

It also shows |XX| for 2,000,000 so I suppose |M| for 100,000,000 etc...

Could you do a double overline for billions etc.?

Incidentally, while searching a couple site show XIX = 19 as the largest prime that is a palindrome in roman numerals.

  Posted by Jer on 2015-04-07 08:54:41
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