The composite cofactor of 5233,71- was the product of 93-digit and 169-digit prime numbers:

93-digit prime factor:
142730023251044581542554889718034876270764586048206941019916962085855468307213117764135803817

169-digit prime factor:
1439193187746835609165679187798873789494208826321854036842740944542944325029147485199624012956256862205785434729191160631452243920596960466262877598636799633497333835039

The factors have been reported to the OddPerfect project.