The composite cofactor of 10,387- was the product of 97-digit and 125-digit prime numbers:

97-digit prime factor:
1716647120944708147671447461422244736431889206579721400376110588630763194268685679597826668704163

125-digit prime factor:
2458805774698219308265723181835724607067016430112739503173718229157676678328011743664725301475\
1961157521531901245152408738293

The factors will be reported to the Cunningham project and will be recorded on Page 118.