--- In

primenumbers@yahoogroups.com, "djbroadhurst" <d.broadhurst@...> wrote:

>

> Phil's guess about the primality of 91 was bettered by

> Grothendieck's guess about the primality of 57:

>

> http://www.ams.org/notices/200410/fea-grothendieck-part2.pdf

>

> >> One striking characteristic of Grothendieck's

> mode of thinking is that it seemed to rely so little

> on examples. This can be seen in the legend of the

> so-called "Grothendieck prime". In a mathematical

> conversation, someone suggested to Grothendieck

> that they should consider a particular prime number.

> "You mean an actual number?" Grothendieck

> asked. The other person replied, yes, an actual

> prime number. Grothendieck suggested, "All right,

> take 57." <<

>

Thank you, David, for directing us to that intriguing article about a very strange man.

I was struck by this:

>>

In a brief memoir about Grothendieck,

Ladegaillerie wrote: "I had had as professors

in Paris some of the great mathematicians of the

day, from Schwartz to Cartan, but Grothendieck was

completely different, an extra-terrestrial.<<

Mike