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 AlphaBrier 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  
