The composite cofactor of 3,625- was the product of 72-digit and 135-digit prime numbers:

72-digit prime factor:
257221971817419112385228087519202709483833420607221254579502990135771251

135-digit prime factor:
112619179702674829064884553285812509307933773764869026935121072882679330426958965375429903438190221908389594199787464711946148729091251

The factors have been reported to the Cunningham project and have been recorded on Page 124.