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News Archive: February 2000

A new twin primes record
Jarai & Indlekofer did it again with the following twin primes record:
2409110779845.2^60000±1, digits= 18075

I should be happy but I'm not because it has just dropped my search for 2 years with an exponent below 60000...such is life...
Posted on Monday, February 28, 2000

Puzzle 83, solved
Luis Rodríguez has solved entirely the puzzle 83 based in info. available in the Ribenboim's "The new book of prime number records", remaining only a computation question.
Posted on Sunday, February 27, 2000

3 new puzzlers short bio's
We say Welcome! to our three new puzzlers:
John L. Miller (Puzzle 68)
Douglas S. Robertson (Puzzle 82)
Alberto Zelaya (Puzzle 83)
Posted on Friday, February 25, 2000

Puzzle 68 & a 99x99 prime magic square
John L. Miller has found a 99x99 prime layered magic square breaking all the previous records for this kind of magic squares, using a code of his own that got these kind of monsters in only... 10 minutes...
Posted on Friday, February 25, 2000

Felice Russo & Puzzle 81
Felice Russo has found smaller pairs of Sophie Germain magic 3x3 squares, 1st & 2nd order.
Posted on Friday, February 25, 2000

Conjecture 15, New Mersene Conjecture
Nuutti Kuosa (10/02/2000) verified that (2^1048573+1)/3 is composite using PRIMEFORM.
Posted on Thursday, February 17, 2000

Problem 31, more results from Wilfrid Keller
Wilfrid Keller sent two more results for the table of the stepladder method that organize the search of the Alpha-Brier number
Posted on Tuesday, February 15, 2000

Puzzle 73, interesting results from Felice Russo
Felice Russo sent interesitng results for the Puzzle 73
Posted on Tuesday, February 15, 2000

Problem 31, Chris Nash search
Chris Nash has tested the "incorrect" Graham solution using PRIMEFORM nevertheless without finding any prime up the 208288th member of this sequence, a number of 43563 digits. He has stopped this search the(12/02/2000)

Posted on Thursday, February 10, 2000

Conjecture 17, Chris Nash results
Chris Nash has solved (12/02/2000) the Ludovicus Conjecture, showing that positively exist an A value for each p, such that A
Posted on Thursday, February 10, 2000

Puzzle 78, Chris Nash solution
Chris Nash has tackled the "hard cases" (ascending K=44 and descending 22 & 110) using PRIMEFORM and formulas from his own, finding a solution for the last one
Posted on Thursday, February 10, 2000

Ludovicus Conjecture & Jud McCranie results
Jud McCranie has found several true minimal A's for 3 primes and an unknown A for the prime 151. See Conjecture 17.
Posted on Thursday, February 3, 2000

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