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[ 3:24:33.57] P:\test>fet3 989 9400 43300 2400
[989 9400 43300 2400]
0.80706046478676263e-7029
  1 trial  of _default (   8.164s total), 8.164s/trial

10389! 4570! 44289! 11800!
------------------------------
...
(||56089..44290) (||43300..11801) 989!

where (||m..n) indicates the product of the series

#! perl -slw
use strict;
...
   65213   65239   65257   65267   65269   65287   65293   65309   653
+23
   65327   65353   65357   65371   65381   65393   65407   65413   654
+19
   65423   65437   65447   65449   65479   65497   65519   65521   655
+37