One more has finished! The composite cofactor of 2,856+ was the product of 69-digit and 155-digit prime numbers:

69-digit prime factor:
371738331695243321977108382044919572516026026284025337809051528873569

155-digit prime factor:
1470431097748887434191347619709790426741577494661631392301635111934205526218983658\
3327383143164509904769943490657458018679109514305697811863653995781888513

The factors will be reported to the Cunningham project and will be recorded on Page 113. Let's keep sieving!