0.prime_division

[email protected]>;3OB9-$G$9!#e(B

ruby -v -r mathn -e ‘0.prime_division’
e$B$,L58B%k!<%W$KF~$C$F$7$^$C$F$+$($C$F$3$J$$$h$&$K8+$($^$9!#e(B

e$BBP1~$7$F$$$J$$$N$J$i!"2?$+Nc30$K$J$C$?J}$,e(B
e$BNI$$$N$G$O$J$$$G$7$g$&$+e(B?