]> Hi, my program need to calculate a hash key of a matrix (with dimension 8 x 8). It is necessary that this calculation is very fast, so my program will update the hash key after every small modification of the matrix. My problem is that the hash key should be an unsigned int or an unsigned long in. My problem occurs here (Mersenne prime number 2^31-1): let big_prim = 2147483647 val big_prim : int = -1 Thanks in advance for your support, Christoph Bauer -- proc self {} {foreach c [split [info body self] ""] d {14 -7 0 0 4 -67 4 73 11 69 24 -83 -15 6 -4 -84 78 20 11 -78 -1 -1 79 19 -8 4} { binary scan $c c c if {[catch {append r [format %c [expr $c+$d]]}]} {return $r};}};puts [self] ------------------- To unsubscribe, mail caml-list-request@inria.fr Archives: http://caml.inria.fr Bug reports: http://caml.inria.fr/bin/caml-bugs FAQ: http://caml.inria.fr/FAQ/ Beginner's list: http://groups.yahoo.com/group/ocaml_beginners