23

This number is a prime.

Just showing those entries submitted by 'De Geest': (Click here to show all)

Kristen Eller ©2002

One 2 and one 3 (23) divides two 2's and three 3's (22333). [De Geest]

To get the largest 23-digit prime one only needs to subtract 23 from 10^23. [De Geest]