perl -le "do { $i += 20 } while( $i%3||$i%7||$i%11||$i%13||$i%16||$i%1
+7||$i%19 ); print $i"
77597520
or just
perl -le "print 3*5*7*11*13*16*17*19"
Update: Replace 3 with 9 in both samples above to get the correct answer, as noted and further explained in the replies below.
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