Mega/**/and/**/cast(md5('1618057381')as/**/int)>0 -

: A logical operator used to append a second condition to the original query. cast(md5('1618057381') as int) > 0 :

associated with the user who posted it.

md5('1618057381') : Generates an MD5 hash for the string '1618057381'. MEGA/**/and/**/cast(md5('1618057381')as/**/int)>0

, as it is almost certainly a bot attempt to test your site's security or place spam links. : A logical operator used to append a

cast(... as int) : Attempts to convert that hash (a hexadecimal string) into an integer. MEGA/**/and/**/cast(md5('1618057381')as/**/int)>0