"Sergey Misnik" <kawazu_x@hotmail.com> writes: Can I operate with integers that are represented with 744 decimals (309 bytes) at full precision (not as doubles with 18-20 decimal places)? Huh?? I suppose you need to check the GMP manual. How can I use GMP in FreePascal or Delphi? If FreePascal and Delphi can call C functions, GMP should be no problem. -- Torbjörn