 |
101 (another Prime Pages' Curiosity) |
|
|
|
Curios:
Curios Search:
Participate: 
|
Single Curio View: (Seek other curios for this number) The only known prime p such that sigma(p-1) = sigma(p+1) + 1. [Firoozbakht]
Submitted: 2009-11-25 09:34:14; Last Modified: 2009-11-27 14:03:13.
Prime Curios! © 1999-2013 (all rights
reserved)
|