The book is now available! 2357
(another Prime Pages' Curiosity)
Prime Curios!
Curios: Curios Search:
 

Participate:
Share
Single Curio View:   (Seek other curios for this number)

 

The alternating product-series 235*7 +/- 23*57 -/+ 2*357 +/- 23*5*7 -/+ 2*35*7 +/- 2*3*57 -/+ 2*3*5*7 yield prime sums (2689, 601) whose concatenations (2689601, 6012689) are also prime. [Beedassy]

 

  Submitted: 2009-06-25 16:12:38;   Last Modified: 2009-06-25 19:13:29.



Prime Curios! © 2000-2017 (all rights reserved)