It is currently set to 6 on Wikimedia Foundation wikis.$wgMainCacheType must be set to a value other than CACHE_NONE for this setting to work.
When using a captcha, failed captcha attempts increment the number of account creation for the IP address. Have this in mind if you have a captcha implemented and you want to set the account creation limit too low. See task T233704
/** * Number of accounts each IP address may create per specified period(s). * * @par Example: * @code * $wgAccountCreationThrottle = [ * // no more than 100 per month * [ * 'count' => 100, * 'seconds' => 30*86400, * ], * // no more than 10 per day * [ * 'count' => 10, * 'seconds' => 86400, * ], * ]; * @endcode * * @warning Requires $wgMainCacheType to be enabled */$wgAccountCreationThrottle=[['count'=>0,'seconds'=>86400,]];
1.3 – 1.27
/** * Number of accounts each IP address may create, 0 to disable. * * @warning Requires $wgMainCacheType to be enabled */$wgAccountCreationThrottle=0;