Rough number

Rough number

A "k"-rough number, as defined by Finch in 2001 and 2003, is a positive integer whose prime factors are all greater than or equal to "k". For example, every integer that is congruent to 3 mod 6 is 3-"rough"; every integer that is congruent to 5 or 25 mod 30 is 5-"rough".

ee also

* Smooth number

References

*
* [http://listserv.nodak.edu/cgi-bin/wa.exe?A2=ind0108&L=nmbrthry&P=963 Finch's definition from Number Theory Archives]


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