From http://www.jwz.org/xscreensaver/xscreensaver-5.31.tar.gz

-rw-r--r-- 1 zblaxell zblaxell 10569562 Nov 15 18:51 xscreensaver-5.31.tar.gz
1b023a3b01f1f23aa136d13c37f79c0c01c3f1e6  xscreensaver-5.31.tar.gz