Dear Sir or Madam: Using g77 (GNU project Fortran Compiler, v0.5.24) I have encountered a problem of array size limitation. I found out that size of an array is limited to 2^27 -1 = 134 217 728, while integer itself can be 2^31 -1 = 2 147 483 647. I actually need an array with 600 000 000 numbers. What can I do? Sincerely, Ignat Shilov