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# 19-rough numbers

From OeisWiki

Least prime factor ≥ 19.

## Sequences

A166061 19-rough numbers: positive integers that have no prime factors less than 19.

- {1, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 101, 103, 107, 109, 113, 127, 131, 137, 139, 149, 151, 157, 163, 167, 173, 179, 181, 191, 193, ...}

## See also

- Seventh row in an illustration for A002110, A005867, A038110, A060753.
- A332798 is the proper subset
*numbers with smallest prime factor 19*. -
*p*-rough numbers