The reported synthesis of element 114 in 1999 appears to lend validity to another model of nuclear stability which suggests that the magic numbers are arranged over a mappable "seascape" which includes narrow islands of special stability.
Uuq-289 was reported to have an estimated half-life over 100,000 times as long as Uub-277 (element 112, reported in 1996). If this model is correct in at least some of its aspects, still heavier nucleons could well turn out to have ordinary stability (i.e., be non-radioactive).