RoS +19 -- is this a record?

[Jay]

After I killed Carcharoth at level 94, he dropped something I've never seen in my years of Angband-ing: a +19 RoS! I can't recall seeing anything over +15 in the past.

So, like the subject line says: Is this a record? How did this happen? What are the odds? I seem to recall reading here at some point that there was theoretically no limit to how high the bonus number could get but the chances of the number going up gets significantly smaller with each subsequent increase. True? Oh, and this is with 4.2.5.

[PowerDiver]

By a remarkable coincidence, I was searching for some old exploit just *yesterday*, and I came upon https://angband.live/ladder/ladder-show.php?id=21757
from PowerWyrm mentioning RoS +24.