A new puzzle every Saturday. Solutions one week later.

***Special invitation to the Collection-20th***
In order to celebrate our 20th anniversary I will accept at least 20 new prime-puzzles, one per puzzler, to be published here starting the next May 26.
I would expect these puzzles shine because of its novelty, ingenuity, difficulty or just beauty.
Please start sending your puzzle-proposal since now on!
3/10/18, and do not stop if the sent puzzle proposal arrive or exceed 20 puzzles. We may accept more, of course!!!

Puzzles received and accepted for the Collection-20th: 23
 (up to 5/11/18).

1043 weeks, 1076 pages & 7301 days
19 years + 11 months +26 days

Puzzle 926. pandigital and prime numbers

The last five news

Date Puzzle about


May-18-18 Puzzle 925 Jan van Delden and Emmanuel Vantieghem
May-11-18 Puzzle 924 & Puzzle 655

Puzzle 9

Jan van Delden

Zak Seidov

May-04-18 Puzzle 923 & Puzzle 791 Jan van Delden
April-27-2018 Puzzle 864

Puzzle 921

Puzzle 922

Edward Kang

Jan van Delden

Seiji Tomita

April-13-19 Puzzle 920  Walter Trump, Jan van Delden and Emmanuel Vantieghem


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These pages will be updated every Saturday morning -- Last Modified on: Friday, 18-May-2018 15:05:17 PDT

"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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