updated congruent number information page (2)

lmfdb/elliptic_curves/templates/congruent_number_data.html

@@ -263,7 +263,8 @@ <h2>Credit and acknowledgements</h2>
 in PARI/GP originally by Robatino of an algorithm in Robatino's 1996 thesis <i>Computation of mock Heegner points
 on modular elliptic curves</i>, following work of Monsky.
 
-Some data was provided by Allan J. MacLeod, Ralph Buchholz and Brett Wittby, and the rest computed by Rathbun using
+Some data was provided by Allan J. MacLeod, and by Ralph Buchholz and
+Brett Wittby, using <tt>Magma</tt>; the rest computed by Rathbun using
  <tt>PARI/GP</tt> and <tt>eclib</tt> (in particular <tt>mwrank</tt>).
 </p>