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Prime number in Irish (Maoluimhir): Meaning, Pronunciation, Usage

The Irish for prime number is maoluimhir, a feminine noun (plural maoluimhreacha).
Updated October 2026Report a mistake

How to say “prime number” in Irish

Irish:
maoluimhir
English:
prime number
Word type:
noun
Gender:
feminine
Pronunciation:
“MWEEL-iv-ir”  /ˈmˠiːlˠˌɪvʲɪɾʲ/
Various forms
Plural:
maoluimhreacha (prime numbers)
Genitive singular:
maoluimhreach, na maoluimhreach (e.g. sainmhíniú na maoluimhreach, the definition of a prime number)
Genitive plural:
maoluimhreacha, na maoluimhreacha (e.g. airíonna na maoluimhreacha, the properties of prime numbers)

What does “maoluimhir” mean?

prime number
A whole number greater than one that can only be divided exactly by itself and by one.Also: prime, prime numeral.

“Maoluimhir” with the article

The plural of prime number in Irish is maoluimhreacha. Here is maoluimhir after the article (an t-alt), in the singular and the plural.

an mhaoluimhir
the prime number
Lenition: m becomes mh after an (feminine noun)
na maoluimhreacha
the prime numbers
Plural: no change after na

“Maoluimhir” in a sentence: Irish examples

Common Irish sentences using maoluimhir, the Irish word for prime number.

Is maoluimhir í seacht.
Seven is a prime number.
Ní maoluimhir í an uimhir naoi.
The number nine is not a prime number.
Cén mhaoluimhir is lú atá ann?
What is the smallest prime number?
Tá líon gan teorainn de mhaoluimhreacha ann.
There are infinitely many prime numbers.
D'fhoghlaim na páistí faoi mhaoluimhreacha inniu.
The children learned about prime numbers today.
Scríobh liosta maoluimhreacha faoi bhun fiche.
Write a list of prime numbers below twenty.
Is é an dó an t-aon mhaoluimhir chothrom.
Two is the only even prime number.

Other nouns in Irish

More everyday Irish nouns to learn next.

Prime number in Irish: frequently asked questions

What is the Irish for prime number?

The Irish for prime number is maoluimhir (pronounced “MWEEL-iv-ir”). It’s a feminine noun and the plural is maoluimhreacha.

How do you pronounce maoluimhir in Irish?

Maoluimhir is said like “MWEEL-iv-ir” (IPA /ˈmˠiːlˠˌɪvʲɪɾʲ/).

What is the plural of prime number in Irish?

The plural of maoluimhir is maoluimhreacha; with the article, na maoluimhreacha means “the prime numbers”. The genitive plural is maoluimhreacha, as in airíonna na maoluimhreacha (the properties of prime numbers).

Why does maoluimhir change to mhaoluimhir?

After words like mo (my) and do (your) the first letter is lenited: mo mhaoluimhir. After ár (our) it stays ár maoluimhir, because m does not take eclipsis.

Why is it 'maoluimhir' for prime number?

It combines 'maol' (bare, blunt) with 'uimhir' (number), a number that is bare of other factors. Do not confuse it with 'príomhuimhir', which is not the standard mathematical term.

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