Some constructions have not been included yet. If you have any difference sets or nonexistence results not in this database, or find any errors, please let me know. The Multiplier Conjecture link below has information about recent computations for v<106.
Groups are specified by their elementary divisors or invariant factors; for example, (96,20,4)-difference sets in the group Z2 ⊕ Z4 ⊕ Z4 ⊕ Z3 may be found by searching for "2,4,12" or "2,4,4,3". You can search for cyclic groups by typing "cyclic" in the group search field.
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