Jean-Claude Rosa & the Problem 36 Jean-Claude Rosa has made an interesting by didactic contribution to the Problem 36. Posted on Tuesday, June 5, 2001

Carlos Gustavo Moreira solves correctly the puzzle 139 Prof. Carlos Gustavo Moreira has corrected the initial solution to the Puzzle 139 given by Ivan M. Gudonov. Posted on Monday, June 4, 2001

Two more contributions Z. Dong solves partially the Ngan's question in Puzzle 139. Shyam Sunder Gupta has produced two more non-primes Rare Numbers with odd quantity of digits, so the Question Q.4 is solved and the Conjecture 23 stands still. Posted on Sunday, June 3, 2001