The Prime Puzzles & Problems Connection, by Carlos Rivera

A new puzzle every Saturday. Solutions one week later.

>>>>Basic Stats<<<<
Feb-14-2026
1448 weeks, 1479 pages & 10129 days
27 years 8 Months 22 days
Since May 23 1998

Puzzle of the week

Puzzle 1258 42312143

Curios by CR in Prime Curios!
(updated on April 30, 2021)

Latest ten news
No.	Date	Puzzle about	Solvers
10	Feb-13-26	Puzzle 1256 Puzzle 1252 Puzzle 1246	Gennady Gusev Simon Cavegn Simon Cavegn
9	Feb-5-26	Puzzle 1256	Gennady Gusev, Emmanuel Vantieghem, Simon Cavegn, Oscar Volpatti
8	Jan-30-26	Puzzle 1255 Puzzle 1254	Michael Branicky, Gennady Gusev, Oscar Volpatti, Emmanuel Vantieghem Jeff Heleen
7	Jan-23-26	Puzzle 1254 Conjecture 109	Jeff Heleen, Carlos Rivera Alessandro Casini, Emmanuel Vantieghem
6	Jan-16-25	Conj.109	Emmanuel Vantieghem
5	Jan-9-26	Puzzle 1253	Ivan Ianakiev, Emmanuel Vantieghem
4	Dec-26-25	Puzzle 1251	Gennady Gusev, Emmanuel Vantieghem, Simon Cavegn, Oscar Volpatti
3	Dec-19-25	Puzzle 1250	Emmanuel Vantieghem
2	Dec-12-25	Puzzle 1249 Puzzle 44	Jeff Heleen, Vicente Felipe Izquierdo Gennady Gusev
1	Dec-5-25	Puzzle 1248	Adam Stinchcombe, Emmanuel Vantieghem, Michael Branicky, Gennady Gusev, Oscar Volpatti, Simon Cavegn

These pages will be updated every Saturday morning -- Last Modified on: Friday, 13-Feb-2026 18:00:12 MST

"Many thanks to Martha Rivera, Miguel H. Rivera and G. L. Honaker, Jr. for reviewing and correcting the very first version of these pages, dated on May 23, 1998 "