Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
quam -prīmum (or quam prī-mum), forthwith, as soon as possible (class.): hominem istum quam primum absolvitote, Ter. Ad. 2, 4, 18: huic mandat, ut ad se quamprimum revertatur, Caes. B. G. 4, 21; Cic. Fam. 2, 6, 1: invisam quaerens quam primum abrumpere lucem, Verg. A. 4, 631.
With posse: ut quamprimum possis, redeas, Plaut. Capt. 2, 3, 88: sed recipe te, quam primum potes, id. Pers. 1, 1, 52.