---- DIOPHANTE magazine I have the chance to have discovered very recently, in the cellar of the Institut Henri Poincaré, Paris, the originals of all the issues of an old magazine on number theory named "Diophante" that everybody thought lost, written in 1948-1952 by André Gérardin at the end of his life. Gérardin (1879-1953), and its first magazine "Sphinx-Oedipe", is one of the most quoted authors referenced by Leonard E. Dickson in his "History of the Theory of Numbers", both Vol 1 and Vol 2. And also one of the most quoted authors referenced by Hugh C. Williams in his 1998 book "Edouard Lucas and Primality Testing". For example, in Diophante, there are several articles written by Aimé Ferrier, holder of the biggest known prime number in 1951: his prime is still today the largest prime found without electronic computer. http://mathworld.wolfram.com/FerriersPrime.html The IHP library will reprint this magazine for some other French libraries. If you know other libraries, out of France, which may be interested by this reprint, send me a message at cboyer@club-internet.fr. I will pass the info to the IHP library. To interested people, I can also send my preface published in this reprint (PDF file... written in French). Best regards. Christian.