The composite cofactor of 3,706+ was the product of 62-digit and 145-digit prime numbers:

62-digit prime factor:
51636231409282982769042393620859721494267440603904093947034581

145-digit prime factor:
7243501031434635274762936819600403837827044052592234202552465392230512193490521256961844691262382799620054218236847482258153930311544231467587053

The factors have been reported to the Cunningham project and have been recorded on Page 126.