\x09 \x09 \x09\x09\x09\x09\x09 \x09 \x09 \x09 \x09 \x09 \x09 \x09 \x09 \x09 \x09\x09 \x09 \x09 \x09 \x09 \x09 \x09 \x09 \x09 \x09 \x09 \x09 \x09 \x09 \x09 \x09 \x09 \x09 \x09 \x09 \x09 \x09 \x09 \x09 \x09 \x09 \x09 \x09 \x09 \x09 \x09 \x09 \x09\x09\x09\x09\x09 \x09 \x09 \x09 \x09 \x09\x09 \x09
Note that non-ascii characters in the above source code will be escaped (such as \x9f).
Disassemble:
mark +0(1b) push +1(1b) dup dup geti retr call null puti push +10(4b) putc jump +0(1b) mark null dup jzero +0(0b) dup push +2(2b) mod jzero -0(0b) push +1(1b) sub call null swap copy +1(1b) add swap jump +0(0b) mark -0(0b) push +2(2b) div call null dup dup mul copy +2(2b) dup mul add swap dup add copy +2(2b) sub copy +2(2b) mul mark +0(0b) swap push +1000(10b) dup dup mul mul mod ret