The composite cofactor of 11,301- was the product of 106-digit and 156-digit prime numbers:

106-digit prime factor:
3976039483499389676430116832962806242630315542305918376132402951153973900378536972807171245752233930860633

156-digit prime factor:
143431603274489333827632922976306375527002795502061753282652525122256521218096635020753694428605246222986451058439320718556500751743561220306419401130484819

The factors have been reported to the Cunningham project and have been recorded on Page 125.