The composite cofactor of 3,583+ was the product of 76-digit and 149-digit prime numbers:

76-digit prime factor:
6806019161925082246071281518922533150717341303971895930804918947171248128397

149-digit prime factor:
815156165779908870579900745723673148300934545386097288523711066293514901982572730799075707631650\
89127268562193643188862285279231504244377632883030867

The factors will be reported to the Cunningham project and will be recorded on Page 117.