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News Archive: March 2000

Puzzle 85
Luis Rodríguez has gotten a qualification of 175% for this puzzle. See Puzzle 85
Posted on Wednesday, March 29, 2000

Puzzle 85, improved qualification
Luis Rodríguez has pushed up the better qualification to 120% with a light modification to his own original solution.
Posted on Sunday, March 26, 2000

The probable 6th prime-repunit
Harvey Dubner found, Set. 99, that R(49081) is probable prime. (better later than never)
Posted on Saturday, March 25, 2000

Puzzle 86, new solution
Jud McCranie has gotten a new entry for the new solutions for K=3 asked in the Puzzle 86
Posted on Sunday, March 19, 2000

Yves Gallot prime record
Yves Gallot has found the 6/3/2000 the "Generalized Fermat Prime" 167176^(2^15)+1 w/171153 digits after 6 months of search running Proth 5.4 on about 10 PII/400. See the status of the search of these primes here. This is the largest prime obtained using the Yves Gallot popular code, Proth.exe
Posted on Saturday, March 18, 2000

Improving solutions of puzzles
Felice Russo improved the initial solution for the Puzzle 85.
James Benfield improved his own solution for the 4x4x4 case of the Puzzle 1.
Posted on Tuesday, March 14, 2000

A 4x4 SG prime magic squares for Puzzle 81
I have received (8/3/2000) by snail-mail a 4x4 prime magic square Sophie-Germain type, sent by John E. Everett, form Waynesboro, VA:
Posted on Thursday, March 9, 2000

Puzzle 84, part 2)
Chris Nash has probed that this kind of sets contain infinite members. As an extra bonus his "existence proof" provides a clue to obtain one new member each at a time (unfortunately the new member produced by his "method" is not the least member). So, the search for the least member is justified and still not solved...
Posted on Saturday, March 4, 2000

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