In March 1999, the same team replaced the 244Pu target with a 242Pu one in order to produce other flerovium isotopes. In this reaction, two atoms of flerovium were produced, decaying via alpha emission with a half-life of 5.5 s. They were assigned as 287Fl. This activity has not been seen again either, and it is unclear what nucleus was produced. It is possible that it was the meta-stable isomer 287mFl or the result of an electron capture branch of 287Fl leading to 287Nh and 283Rg.