Prime

головни́й

holovnýj

(first in importance, degree, or rank)

основни́й

osnovnýj

(first in importance, degree, or rank)

пе́рший

péršyj

(first in time, order, or sequence)

перви́нний

pervýnnyj

(first in time, order, or sequence)

першокла́сний

peršoklásnyj

(first in excellence, quality, or value)

просте́ число́

prosté čysló

(mathematics: having no factors except itself and unity)