The Prime Puzzles & Problems Connection, by Carlos Rivera

A new puzzle every Saturday. Solutions one week later.

>>>>Basic Stats<<<<
Feb-15-2020
1134 weeks, 1166 pages & 7978 days
21 years + 8 month + 23 days
since
May-23-1998

>>>>Puzzlers Statistics<<<<
(updated on Feb 28 2019)

Our dear friend Farideh Firoozbakht passed away on Dec 24, 2019.
See more details in her short bio page.
Note published on Jan 11, 2020

Puzzle of the week

Puzzle 990. K n-values in AP with the same sigma(n)

Curios by CR in Prime Curios!
(updated on Feb 28 2019)

The last five news
Date	Puzzle about	Solvers
Feb-14-20	Puzzle 989 Puzle 79	Paul Leary, Giovanni Resta, Emmanuel Vantieghem, Oscar Volpatti Arkadiusz Wesolowski
Feb-07-2020	Puzzle 988 Puzzle 986 Puzzle 841	Michael Hürter nd Dmitry Kamenetsky Gennady Gusev and Mark Mammel Natalia Makarova
Jan-31-2020	Puzzle 987 Puzzle 782 Puzzle 986	Carlos Rivera, Oscar Volpatti and Emmanuel Vantieghem Giovanni Resta Paul Cleary and Mark Mammel
Jan-24-20	Puzzle 986	Gennady Gusev
Jan-17-20	Puzzle 985	Giovanni Resta, Adam Stinchcombe, Jan van Delden

These pages will be updated every Saturday morning -- Last Modified on: Friday, 14-Feb-2020 14:58:55 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 "