One way the Romans had of writing 1000 was CIƆ. According to legend this was the basis of the infinity symbol.
So I'm plumping for CIƆ, meaning infinity.
Edited on April 7, 2015, 9:50 am
blackjack
<a href="http://c.casalemedia.com/c?s=51816&f=3&id=0" target="_blank"><img src="http://as.casalemedia.com/s?s=51816&u=http://perplexus.info&f=3&id=0&if=0" width="120" height="600" border="0"></a>
flooble's webmaster puzzle
re: Depending on what's allowed.
