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two

In a sentence
Dvojka je jediné párne prvočíslo.
Two is the only even prime number.
Dvojka je prvočíslo.
Two is a prime number.
Examples from Tatoeba (CC BY 2.0 FR).
Source
Slovak National Corpus (SNK) ↗English gloss from the frequency publish path. Example sentences from Tatoeba (CC BY 2.0 FR).
Full attribution on References.