Hello All ! I work with long integers. I use in my program: INTEGER *8 c/Z'7FFFFFFFFFFFFFFF'/ where 7FFFFFFFFFFFFFFF = 92233720368547755807 = 2^63-1 - maximal integer number. From compiller I receive: INTEGER *8 c/Z'7FFFFFFFFFFFFFFF'/ ^ Integer at (^) too large. When I use another construction: INTEGER *8 c c=92233720368547755807 I receive analogous answer. Please, help me. Nodar Shubitidze Lab. Nuclear problems Joint Institute for Nuclear Research Dubna, Moscow region, RUSSIA