A new puzzle every Saturday. Solutions one week later.

>>>>Basic Stats<<<<
Sep.-26-2026
1479 weeks, 1510 pages & 10353 days
28 years 3 Months 3 days
Since May 23 1998

Puzzle of the week

Conjecture 115.  Test for primes

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

Latest ten news

No.

Date Puzzle about

Solvers

10 Sep.-25-25 Puzzle 1282

Links & Puzzle 1279
Michael Branicky

C. Rivera has updated his Covering Sets Calculador
9 Sep.-11-26 Conjecture 113

Puzzle 71
Alain Rochelli

Diego González Gauss
8 Sep.-4-26 Puzzle 1281  Rahid Zaman, Michael Branicky, Giorgos Kalogeropoulos, Paul Cleary, Michael Hürter
7 Aug-28-26 See The Links page.



Puzzle
Coll20th-20


Problem 92
C. Rivera updates his two Calculators online:
CS Calculator V8 and 3NCS2.

Giorgos Kalogeropoulos/Rahid Zaman

Eric Brier
6 Aug-21-26 Puzle 1279 Arkadiusz Wesoloski, Carlos Rivera
5 Aug-14-26 Puzzle 1279

Problem 92
Emilia Gurisatti, Carlos Rivera

Emilia Gurisatti
4 Aug-7-2026 Puzzle 1278 Roberto Carlo Angelone
3 July-31-2026 Puzzle 1277 Paul Cleary, Michael Hürter, Giorgos Kalogeropoulos
2 July-24.2026 Puzzle 1276


Puzzle 1275
Ashaz Jameel, Paul Cleary, Oscar Volpatti, Giorgos Kalogeropoulos.

Ankit Chakraborty.

Carlos Rivera (about a new & larger Magic square, 19683x19683, sent by Roberto Carlos Angelone)
1 July-17-2026 Puzzle 1275

Puzzle 1002
Carlos Rivera

Rahid Zaman

 


These pages will be updated every Saturday morning -- Last Modified on: Friday, 25-Sep-2026 15:50:57 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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