# Gavin Andresen
# 2011-11-16 22:52:15
# https://bitcointalk.org/index.php?topic=52035.msg621075#msg621075

Neither of those addresses are valid according to my bitcoind: @p{par}


Code:
$ bitcoind validateaddress 1AYSPTVt8WytG12Kz9guUpXjwAMFZG9CJh @p{brk}
{ @p{brk}
    "isvalid" : false @p{brk}
} @p{brk}
$ bitcoind validateaddress 1AYSPTVt8WytG12Kz9guUpXjeAMFb7AX2K @p{brk}
{ @p{brk}
    "isvalid" : false @p{brk}
} @p{brk}

 @p{brk}
The checksum in addresses is 4 bytes, so there is a one-in-four-billion chance that a random typo would get you a valid address. @p{brk}