Terolos

View full site to see MathJax equation

Terolos is equal to \(2^{16,384}\) or \(2^{2^{14}}\). The term was coined by Oganso.^[1] It is 4,933 digits long.

Ruble calls it Tooerforerlong as it's the two fourth (eighth in decimal) -long.^[2]

Etymology[]

The name was derived from the Proto-Indo-European -teros, meaning "especially".

Decimal expansion[]

1189731495357231765085759326628007130763444687096510237472674821233261358180483686904488595472612039915115437484839309258897667381308687426274524698341565006080871634366004897522143251619531446845952345709482135847036647464830984784714280967845614138476044338404886122905286855313236158695999885790106357018120815363320780964323712757164290613406875202417365323950267880089067517372270610835647545755780793431622213451903817859630690311343850657539360649645193283178291767658965405285113556134369793281725888015908414675289832538063419234888599898980623114025121674472051872439321323198402942705341366951274739014593816898288994445173400364617928377138074411345791848573595077170437644191743889644885377684738322240608239079061399475675334739784016491742621485229014847672335977897158397334226349734811441653077758250988926030894789604676153104257260141806823027588003441951455327701598071281589597169413965608439504983171255062282026626200048042149808200002060993433681237623857880627479727072877482838438705048034164633337013385405998040701908662387301605018188262573723766279240798931717708807901740265407930976419648877869604017517691938687988088008944251258826969688364194133945780157844364946052713655454906327187428531895100278695119323496808703630436193927592692344820812834297364478686862064169042458555136532055050508189891866846863799917647547291371573500701015197559097453040033031520683518216494195636696077748110598284901343611469214274121810495077979275556645164983850062051066517084647369464036640569339464837172183352956873912042640003611618789278195710052094562761306703551840330110645101995435167626688669627763820604342480357906415354212732946756073006907088870496125050068156659252761297664065498347492661798824062312210409274584565587264846417650160123175874034726261957289081466197651553830744424709698634753627770356227126145052549125229448040149114795681359875968512808575244271871455454084894986155020794806980939215658055319165641681105966454159951476908583129721503298816585142073061480888021769818338417129396878371459575846052583142928447249703698548125295775920936450022651427249949580708203966082847550921891152133321048011973883636577825533325988852156325439335021315312134081390451021255363707903495916963125924201167877190108935255914539488216897117943269373608639074472792751116715127106396425081353553137213552890539802602978645319795100976432939091924660228878912900654210118287298298707382159717184569540515403029173307292454391789568674219640761451173600617752186991913366837033887201582071625868247133104513315097274713442728340606642890406496636104443217752811227470029162858093727701049646499540220983981932786613204254226464243689610107429923197638681545837561773535568984536053627234424277105760924864023781629665526314910906960488073475217005121136311870439925762508666032566213750416695719919674223210606724721373471234021613540712188239909701971943944347480314217903886317767779921539892177334344368907550318800833546852344370327089284147501640589448482001254237386680074457341910933774891959681016516069106149905572425810895586938833067490204900368624166301968553005687040285095450484840073528643826570403767157286512380255109954518857013476588189300004138849715883139866071547574816476727635116435462804401112711392529180570794193422686818353212799068972247697191474268157912195973794192807298886952361100880264258801320928040011928153970801130741339550003299015924978259936974358726286143980520112454369271114083747919007803406596321353417004068869443405472140675963640997405009225803505672726465095506267339268892424364561897661906898424186770491035344080399248327097911712881140170384182058601614758284200750183500329358499691864066590539660709069537381601887679046657759654588001937117771344698326428792622894338016112445533539447087462049763409147542099248815521395929388007711172017894897793706604273480985161028815458787911160979113422433557549170905442026397275695283207305331845419990749347810524006194197200591652147867193696254337864981603833146354201700628817947177518115217674352016511172347727727075220056177748218928597158346744541337107358427757919660562583883823262178961691787226118865632764934288772405859754877759869235530653929937901193611669007472354746360764601872442031379944139824366828698790212922996174192728625891720057612509349100482545964152046477925114446500732164109099345259799455690095576788686397487061948854749024863607921857834205793797188834779656273479112388585706424836379072355410286787018527401653934219888361061949671961055068686961468019035629749424086587195041004404915266476272761070511568387063401264136517237211409916458796347624949215904533937210937520465798300175408017538862312719042361037129338896586028150046596078872444365564480545689033575955702988396719744528212984142578483954005084264327730840985420021409069485412320805268520094146798876110414583170390473982488899228091818213934288295679717369943152460447027290669964066816

Approximations[]

Notation	Approximation
Hyper-E notation	\(\textrm{E}[2]14\#2\) (exact)
Arrow notation	\(2 \uparrow 2 \uparrow 14\) (exact)
Fast-growing hierarchy	\(f_2(16,369)\)

Sources[]

↑ binary googology stage 1^{[dead link]} (retrieved 2024-12-09)
↑ List of the -long suffix numbers. retrieved November 3, 2025

Oganso's googology

Penku stage: Two · Four · Nybble · Byte · Short · Int · Long · Overos · Überos · Yfiros · Superos · Hyperos · Ultralos · Hellos · Terolos · Plenolos · Penku

The -long suffix numbers

[1] ry googology stage 1^{[dead link]} (retrieved 2024-12-09)

[2] List of the -long suffix numbers. retrieved November 3, 2025

[1]

[2]