23-rough numbers

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Least prime factor   ≥   23.

Sequences

A166063 23-rough numbers: positive integers that have no prime factors less than 23.

{1, 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, 197, ...}

See also

• Eigth row in an illustration for A002110, A005867, A038110, A060753.
• A332797 is the proper subset numbers with smallest prime factor 23.
• p-rough numbers

• 2-rough numbers
• 3-rough numbers
• 5-rough numbers
• 7-rough numbers
• 11-rough numbers
• 13-rough numbers
• 17-rough numbers
• 19-rough numbers