Tangetially related: For the people who don't know, I found out recently that x!! isn't the same as (x!)! (repeated factorial), in fact, !! is a LOT less big than repeated factorial.
For example, while 30!! is 4.286 x 10^16 (so a number with 17 digits), doing 30! and then ! the result of that, would be a number with an unfathomable 10^33 digits.
n!! is its own operator called the "double factorial" and is even smaller than the regular !, because it's the product of only the odd numbers up to n.
22 Comments
subtext@lemmy.world · 68 pts · 1y
I can’t even imagine a bug with 30!! legs, that would be an absolutely absurd number.
4.285 × 10^16 legs would just look silly.
Mirodir@discuss.tchncs.de · 29 pts · 1y
Tangetially related: For the people who don't know, I found out recently that x!! isn't the same as (x!)! (repeated factorial), in fact, !! is a LOT less big than repeated factorial.
For example, while 30!! is 4.286 x 10^16 (so a number with 17 digits), doing 30! and then ! the result of that, would be a number with an unfathomable 10^33 digits.
n!! is its own operator called the "double factorial" and is even smaller than the regular !, because it's the product of only the odd numbers up to n.
Edit: escape characters
icelimit@lemmy.ml · 7 pts · 1y
Til. What's 10!!! ?
saigot@lemmy.ca · 10 pts · 1y
x!_(n) is the product of the positive numbers congruent to x (mod n) and less than or equal to x. put more simply x*(x-n)*(x-2n)...
so 10!!! = 10*7*4*1
icelimit@lemmy.ml · 6 pts · 1y
Til. Then what's 10. ?
skulblaka@sh.itjust.works · 15 pts · 1y
somerandomperson@lemmy.dbzer0.com · 1 pts · 1y
!10
skulblaka@sh.itjust.works · 2 pts · 1y
Mirodir@discuss.tchncs.de · 1 pts · 1y
No clue. Wolfram Alpha interprets it as (10!!)!, so I assume !!! isn't an established operator, unlike the very unintuitive !!.
icelimit@lemmy.ml · 1 pts · 1y
Above dude says it's 1074*1.
IndiBrony@lemmy.world · 15 pts · 1y
Biblically accurate millipede
naeap@sopuli.xyz · 15 pts · 1y
I think 30 should look better than 15.
Like 7 legs on each side and one in the back as mechanical afterburner?
9point6@lemmy.world · 13 pts · 1y
The other guy was making a maths joke
"30!!" Is 30 double factorial and therefore that very large number
naeap@sopuli.xyz · 2 pts · 1y
Ah, fuck...got wooshed
AnUnusualRelic@lemmy.world · 3 pts · 1y
I'm sure they'd love to have a spare. Accidents happen, you know?
ivanafterall@lemmy.world · 3 pts · 1y
I assume it's like my third leg, which I mostly just let drag. Occasionally, I'll throw it over my shoulder like a continental soldier.
usualsuspect191@lemmy.ca · 26 pts · 1y
Maybe they wanted it
ickplant@lemmy.world · 8 pts · 1y
I love this
SlartyBartFast@sh.itjust.works · 3 pts · 1y
Centipood heehee
ChaoticNeutralCzech@feddit.org · 3 pts · 1y
An even number of legs? On a member of the Bilateria clade?