A new puzzle every Saturday. Solutions one week later.

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(updated on May 1, 2021)

Puzzle of the week

Puzzle 1086 Take the representation of a prime p in the bases from 2 to 9, and...

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

Latest ten news


Date Puzzle about


10 May-13-22 Puzzle 1085 Giorgio Vecchi
9 May-6-22 Conjecture 93

Puzzle 1079


Simon Cavegn, Alain Rochelli

Giorgio Vecchi

8 Apr-29-22 Puzzle 1084 Giorgos Kalogeropoulos, Oscar Volpatti, Emmanuel Vantieghem.
7 April-22-22 Puzzle 1083 Oscar Volpatti
6 Apr-15-22 Puzzle 1082 Claudio Meller, Paul Cleary, Giorgos Kalogeropoulos, Oscar Volpatti, Emmanuel Vantieghem.
5 Apr-8-22 Puzzle 1081 Gennady Gusev, Oscar Volpatti
4 Apr-1-22 Puzzle 841 Natalia Makarova
3 March-25-22 Puzzle 1079

Puzzle 1071

Dmitry Kamenetsky, Giorgos Kalogeropoulos, Fred Schneider.

Dmitry Kamenetsky


2 March-11-22 Puzzle 1078

Conjecture 55

Puzzle 1070

Richard Chen, Alain Rochelli,

Richard Chen

Claudio Meller

1 March-5-22 Puzzle 1077 Adam Stinchcombe, Giorgos Kalogeropoulos, Emmanuel Vantieghem, Gennady Gusev, Jean-Marc REBERT, Oscar Volpatti.


These pages will be updated every Saturday morning -- Last Modified on: Saturday, 14-May-2022 08:09:59 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 "

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