42135...42202 (6223-digits)

This number is a composite.

Call this number d=5612052289*14500#/5 and you get along with d = -1, +1, +5 the first known prime triplet greater than 20000 bits. The 3rd number was certifyed by PRIMO in only 850 hours. This is the first PRIMO multiprocessor certificate. [Luhn]