So the contest is still going on even though they mentioned it would be stopped somewhere in 2015? Is the prize for #30 still available?
Yeah, knock yourself out trying for #30. It doesn't look like RushWallet is updating the balances on their site anymore to easily check these (they aren't showing transactions anymore and require you to export your private key), so you probably have to plug it in to a different brain wallet website that uses the same method. The following one works, just click on the Brain Wallet tab, and the Passphrase is your guess, then check the public address (not the private key) that it generates on a block explorer:
https://www.bitaddress.org/bitaddress.org-v1.7-SHA1-.html